Update log plugin to support more than one test case runs

[keirazhang]

Changes in this fix will print test cases in order in results.log with a case index in front of them, so that it can distinguish different runs for same test case. And test case log folder will have same case index in front of folder name.

If there are less than 10 test cases, case index will start from "1".
If there are 10 or more test cases, case index will starts from "01".

Testbed information:
+------------------------------------------------------------------------------------------+
| Product | Version | Build    | Hostname or IP | Server Model                             |
+------------------------------------------------------------------------------------------+
| vCenter | 8.0.0   | 20519528 | x.x.x.x  |                                          |
+------------------------------------------------------------------------------------------+
| ESXi    | 8.0.0   | 20513097 | x.x.x.x | VMware, Inc. VMware7,1                   |
|         |         |          |                | Intel(R) Xeon(R) Gold 6230 CPU @ 2.10GHz |
+------------------------------------------------------------------------------------------+


VM information:
+----------------------------------------------------------------------+
| Name                      | test_ubuntu22.10_ova-3                   |
+----------------------------------------------------------------------+
| Guest OS Distribution     | Ubuntu 22.10 x86_64                      |
+----------------------------------------------------------------------+
| IP                        | 10.186.131.184                           |
+----------------------------------------------------------------------+
| GUI Installed             | False                                    |
+----------------------------------------------------------------------+
| CloudInit Version         |                                          |
+----------------------------------------------------------------------+
| Hardware Version          | vmx-20                                   |
+----------------------------------------------------------------------+
| VMTools Version           | 12.3.0 (build-21507661)                  |
+----------------------------------------------------------------------+
| Config Guest Id           | ubuntu64Guest                            |
+----------------------------------------------------------------------+
| GuestInfo Guest Id        | ubuntu64Guest                            |
+----------------------------------------------------------------------+
| GuestInfo Guest Full Name | Ubuntu Linux (64-bit)                    |
+----------------------------------------------------------------------+
| GuestInfo Guest Family    | linuxGuest                               |
+----------------------------------------------------------------------+
| GuestInfo Detailed Data   | architecture='X86'                       |
|                           | bitness='64'                             |
|                           | distroAddlVersion='22.10 (Kinetic Kudu)' |
|                           | distroName='Ubuntu'                      |
|                           | distroVersion='22.10'                    |
|                           | familyName='Linux'                       |
|                           | kernelVersion='5.19.0-21-generic'        |
|                           | prettyName='Ubuntu 22.10'                |
+----------------------------------------------------------------------+


Test Results (Total: 4, Passed: 4, Elapsed Time: 00:30:48)
+----------------------------------------------+
| ID | Name               | Status | Exec Time |
+----------------------------------------------+
|  1 | deploy_vm_ova      | Passed | 00:07:11  |
|  2 | check_os_fullname  | Passed | 00:01:12  |
|  3 | ovt_verify_install | Passed | 00:20:57  |
|  4 | check_os_fullname  | Passed | 00:01:10  |
+----------------------------------------------+


VM information:
+------------------------------------------------------------------------------------------+
| Name                      | test_windows_server_ltsc_vnext                               |
+------------------------------------------------------------------------------------------+
| Guest OS Distribution     | Microsoft Windows Server 2022 Datacenter 10.0.25314.0 64-bit |
+------------------------------------------------------------------------------------------+
| IP                        | x.x.x.x                                      |
+------------------------------------------------------------------------------------------+
| Hardware Version          | vmx-20                                                       |
+------------------------------------------------------------------------------------------+
| VMTools Version           | x.x.x                              |
+------------------------------------------------------------------------------------------+
| Config Guest Id           | windows2019srvNext_64Guest                                   |
+------------------------------------------------------------------------------------------+
| GuestInfo Guest Id        | windows2022srvNext_64Guest                                   |
+------------------------------------------------------------------------------------------+
| GuestInfo Guest Full Name | Microsoft Windows Server 2025 (64-bit)                       |
+------------------------------------------------------------------------------------------+
| GuestInfo Guest Family    | windowsGuest                                                 |
+------------------------------------------------------------------------------------------+
| GuestInfo Detailed Data   | architecture='X86'                                           |
|                           | bitness='64'                                                 |
|                           | buildNumber='25314'                                          |
|                           | distroVersion='Windows'                                      |
|                           | distroAddlVersion='10.0'                                     |
|                           | familyName='Windows'                                         |
|                           | kernelVersion='25314.1000'                                   |
|                           | prettyName='Windows Server 2025, 64-bit (Build 25314.1000)'  |
+------------------------------------------------------------------------------------------+


Test Results (Total: 27, Passed: 27, Elapsed Time: 02:23:50)
+------------------------------------------------------------+
| ID | Name                             | Status | Exec Time |
+------------------------------------------------------------+
| 01 | deploy_vm_efi_nvme_e1000e        | Passed | 00:13:52  |
| 02 | check_inbox_driver               | Passed | 00:03:30  |
| 03 | secureboot_enable_disable        | Passed | 00:05:43  |
| 04 | wintools_complete_install_verify | Passed | 00:10:47  |
| 05 | check_efi_firmware               | Passed | 00:00:58  |
| 06 | check_ip_address                 | Passed | 00:01:07  |
| 07 | check_os_fullname                | Passed | 00:00:49  |
| 08 | mouse_driver_vmtools             | Passed | 00:00:40  |
| 09 | vgauth_check_service             | Passed | 00:00:49  |
| 10 | stat_balloon                     | Passed | 00:00:50  |
| 11 | stat_hosttime                    | Passed | 00:00:58  |
| 12 | paravirtual_vhba_device_ops      | Passed | 00:05:25  |
| 13 | lsilogicsas_vhba_device_ops      | Passed | 00:06:00  |
| 14 | sata_vhba_device_ops             | Passed | 00:05:36  |
| 15 | nvme_vhba_device_ops             | Passed | 00:07:18  |
| 16 | nvme_vhba_device_ops_spec13      | Passed | 00:07:35  |
| 17 | nvme_disk_hot_extend_spec13      | Passed | 00:05:19  |
| 18 | nvdimm_cold_add_remove           | Passed | 00:09:42  |
| 19 | e1000e_network_device_ops        | Passed | 00:05:45  |
| 20 | vmxnet3_network_device_ops       | Passed | 00:04:58  |
| 21 | memory_hot_add_basic             | Passed | 00:05:15  |
| 22 | check_quiesce_snapshot           | Passed | 00:02:32  |
| 23 | cpu_multicores_per_socket        | Passed | 00:10:24  |
| 24 | gosc_sanity_staticip             | Passed | 00:06:56  |
| 25 | gosc_sanity_dhcp                 | Passed | 00:09:08  |
| 26 | wintools_uninstall_verify        | Passed | 00:06:25  |
| 27 | cpu_hot_add_basic                | Passed | 00:04:00  |
+------------------------------------------------------------+

Test cases log folders will be like

01_deploy_vm
02_check_inbox_driver
07_check_os_fullname
11_check_quiesce_snapshot_custom_script
20_gosc_perl_dhcp
21_gosc_perl_staticip
22_gosc_cloudinit_dhcp
23_gosc_cloudinit_staticip
29_nvdimm_cold_add_remove

The play name in log files will also has the case index:

2023-03-26 15:51:14,026 | Failed at Play [29_nvdimm_cold_add_remove] *****************

2023-03-26 15:51:14,026 | TASK [29_nvdimm_cold_add_remove][Check the new PMem device is recognized by guest OS after cold add] 
task path: /home/worker/workspace/Ansible_Regression_Ubuntu_20.04_Server_OVA/ansible-vsphere-gos-validation/linux/nvdimm_cold_add_remove/cold_add_nvdimm_test.yml:117
fatal: [localhost]: FAILED! => {
    "assertion": "(guest_nvdimm_list_after_add | difference(guest_nvdimm_list_before_add)) | length == 1",
    "changed": false,
    "evaluated_to": false,
    "msg": "Guest PMem device list before cold add is [], after cold add is [], the new added PMem device is not recognized."
}
error message:
Guest PMem device list before cold add is [], after cold add is [], the new added PMem device is not recognized.

Deploy_vm failure would block the rest of test cases:

Test Results (Total: 4, Failed: 1, Blocked: 3, Elapsed Time: 01:16:00)
+---------------------------------------------------------------+
| ID | Name                             |   Status  | Exec Time |
+---------------------------------------------------------------+
|  1 | deploy_vm_efi_lsilogicsas_e1000e | * Failed  | 01:14:59  |
|  2 | wintools_complete_install_verify | * Blocked | 00:00:00  |
|  3 | guest_os_inplace_upgrade         | * Blocked | 00:00:00  |
|  4 | wintools_complete_install_verify | * Blocked | 00:00:00  |
+---------------------------------------------------------------+

[Tomorrow9]

LGTM, thanks!