Crm tests (sonic-net#448)

* update to SAI 1.2

* set LAG PORT_VLAN_ID instead of member port VLAN id

* [test]: Add test for the CRM feature

Signed-off-by: Volodymyr Samotiy <volodymyrs@mellanox.com>

* [test]: Add test for the CRM feature

* Fix review comments

Signed-off-by: Volodymyr Samotiy <volodymyrs@mellanox.com>

* update to SAI 1.2

* set LAG PORT_VLAN_ID instead of member port VLAN id

* [test]: Add ACL test for the CRM feature

Signed-off-by: Volodymyr Samotiy <volodymyrs@mellanox.com>

* update to SAI 1.2

* set LAG PORT_VLAN_ID instead of member port VLAN id

* [test]: Add test for the CRM feature

* Use static neighbors instead of configuring server side
* Change polling interval value to 1 second
* Rename "nexthop_group_object" resource to "nexthop_group"

Signed-off-by: Volodymyr Samotiy <volodymyrs@mellanox.com>

* [crmorch]: Implement CRM feature (sonic-net#447)

Signed-off-by: Volodymyr Samotiy <volodymyrs@mellanox.com>

* [lua]: Only set the entry values when they are not nil (sonic-net#446)

* [lua]: Only set the entries when they are not nil

Signed-off-by: Sihui Han <sihan@microsoft.com>

* udpate

* further fix the detection time nil error

Signed-off-by: Sihui Han <sihan@microsoft.com>

* [test]: Add test for the CRM feature

* Fix fails in some test cases

Signed-off-by: Volodymyr Samotiy <volodymyrs@mellanox.com>

* [test]: Add test for the CRM feature

* Fix fails in IPv6 test cases

Signed-off-by: Volodymyr Samotiy <volodymyrs@mellanox.com>