Azure.Sdk.Tools.TestProxy_1.0.0-dev.20220202.1

Fill ms.author metadata for docs. (#2608)

The PR is filling the `ms.author` metadata for Doc.Ms. 

We use opensource aad app to call the opensource rest API. 

Will test later in pipeline.
Pipeline with serects:https://dev.azure.com/azure-sdk/internal/_build/results?buildId=1328164&view=results

Pre-requisites:
1. (Done)~~Have $(TenantId)/$(ClientId)/$(ClientSecret) setup in vairable groups.~~