changeanalysis only track2 configure (Azure#13627)

* changeanalysis only track2 configure

* Update readme.python.md

* path modification

* remodify

Co-authored-by: Yan Zhang (WICRESOFT NORTH AMERICA LTD) <v-yanzhang@microsoft.com>
Co-authored-by: msyyc <70930885+msyyc@users.noreply.github.com>

specification/changeanalysis/resource-manager/readme.md

@@ -58,7 +58,7 @@ This is not used by Autorest itself.
 
 ``` yaml $(swagger-to-sdk)
 swagger-to-sdk:
-  - repo: azure-sdk-for-python
+  - repo: azure-sdk-for-python-track2
   - repo: azure-sdk-for-java
   - repo: azure-sdk-for-go
   - repo: azure-sdk-for-js

specification/changeanalysis/resource-manager/readme.python.md

@@ -3,19 +3,21 @@
 These settings apply only when `--python` is specified on the command line.
 Please also specify `--python-sdks-folder=<path to the root directory of your azure-sdk-for-python clone>`.
 
-```yaml $(python)
-python:
-  azure-arm: true
-  license-header: MICROSOFT_MIT_NO_VERSION
-  payload-flattening-threshold: 2
-  namespace: Microsoft.ChangeAnalysis
-  package-name: changeanalysis
-  package-version: 2020-04-01-preview
-  clear-output-folder: true
+```yaml $(python) && $(track2)
+azure-arm: true
+license-header: MICROSOFT_MIT_NO_VERSION
+namespace: Microsoft.ChangeAnalysis
+package-name: azure-mgmt-changeanalysis
+package-version: 1.0.0b1
+clear-output-folder: true
 ```
 
-```yaml $(python)
-python:
-  no-namespace-folders: true
-  output-folder: $(python-sdks-folder)/azure-mgmt/changeanalysis
+```yaml $(python-mode) == 'update' && $(track2)
+no-namespace-folders: true
+output-folder: $(python-sdks-folder)/changeanalysis/azure-mgmt-changeanalysis/azure/mgmt/changeanalysis
+```
+
+```yaml $(python-mode) == 'create' && $(track2)
+basic-setup-py: true
+output-folder: $(python-sdks-folder)/changeanalysis/azure-mgmt-changeanalysis
 ```