message: add datashare track2 config
diff: 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)
  +```yaml $(python) && !$(track2)
  python:
  azure-arm: true
  license-header: MICROSOFT_MIT_NO_VERSION
  @@ -12,14 +12,30 @@ python:
  package-version: 2019-11-01
  clear-output-folder: true
  ```
  +```yaml $(python) && $(track2)
  +azure-arm: true
  +license-header: MICROSOFT_MIT_NO_VERSION
  +namespace: azure.mgmt.datashare
  +package-name: azure-mgmt-datashare
  +package-version: 2019-11-01
  +clear-output-folder: true
  +```
  -``` yaml $(python) && $(python-mode) == 'update'
  +``` yaml $(python) && $(python-mode) == 'update' && !$(track2)
  python:
  no-namespace-folders: true
  output-folder: $(python-sdks-folder)/datashare/azure-mgmt-datashare/azure/mgmt/datashare
  ```
  -``` yaml $(python) && $(python-mode) == 'create'
  +``` yaml $(python) && $(python-mode) == 'create' && !$(track2)
  python:
  basic-setup-py: true
  output-folder: $(python-sdks-folder)/datashare/azure-mgmt-datashare
  ```
  +``` yaml $(python) && $(python-mode) == 'update' && $(track2)
  +no-namespace-folders: true
  +output-folder: $(python-sdks-folder)/datashare/azure-mgmt-datashare/azure/mgmt/datashare
  +```
  +``` yaml $(python) && $(python-mode) == 'create' && $(track2)
  +basic-setup-py: true
  +output-folder: $(python-sdks-folder)/datashare/azure-mgmt-datashare
  +```
  \ No newline at end of file
  