Update python track2 sdk for deviceupdate (Azure#13223)

* Update python track2 sdk for deviceupdate

* fix

specification/deviceupdate/resource-manager/readme.md

@@ -61,7 +61,7 @@ This is not used by Autorest itself.
 ```yaml $(swagger-to-sdk)
 swagger-to-sdk:
   - repo: azure-sdk-for-net
-  - repo: azure-sdk-for-python
+  - repo: azure-sdk-for-python-track2
   - repo: azure-sdk-for-go
     after_scripts:
       - bundle install && rake arm:regen_all_profiles['azure_mgmt_deviceupdate']

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

@@ -3,16 +3,20 @@
 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
-  azure-arm: true
-  license-header: MICROSOFT_MIT_NO_VERSION
-  payload-flattening-threshold: 2
-  namespace: azure.mgmt.deviceupdate
-  package-name: azure_mgmt_deviceupdate
-  package-version: 2020-03-01-preview
-  clear-output-folder: true
-  add-credentials: true 
-  credential-scopes: 9347d57b-9e24-4142-b4a3-20576bf22aa3/.default
-  no-namespace-folders: true
-  output-folder: $(python-sdks-folder)/sdk/deviceupdate/azure-mgmt-deviceupdate/azure/mgmt/deviceupdate
+```yaml $(python) && $(track2)
+azure-arm: true
+license-header: MICROSOFT_MIT_NO_VERSION
+package-name: azure-mgmt-deviceupdate
+package-version: 1.0.0b1
+no-namespace-folders: true
+```
+
+```yaml $(python) && $(track2) && $(python-mode) == 'update'
+no-namespace-folders: true
+output-folder: $(python-sdks-folder)/deviceupdate/azure-mgmt-deviceupdate/azure/mgmt/deviceupdate
+```
+
+```yaml $(python) && $(track2) && $(python-mode) == 'create'
+basic-setup-py: true
+output-folder: $(python-sdks-folder)/deviceupdate/azure-mgmt-deviceupdate
 ```