…into new_polling

* 'master' of https://github.com/Azure/azure-sdk-for-python: (281 commits)
  [Communication] Add variable groups necessary for using new azure subscription (Azure#15213)
  Sync eng/common directory with azure-sdk-tools for PR 1153 (Azure#15322)
  [Communication] Update version for Preview 3 release (Azure#15317)
  Increment package version after release of azure_data_tables (Azure#15291)
  [monitor] README + samples _ ci.yml (Azure#15288)
  refdoc aka.ms link was broken and silently redirecting, have replaced with azuresdkdocs link as is used in other SDKs. (Azure#15169)
  Sync eng/common directory with azure-sdk-tools for PR 1202 (Azure#15297)
  Updating OT exporter to consume latest version of OpenTelemetry API/SDK (Azure#15289)
  Change live test resource DeleteAfterHours tag to 8 hours (Azure#15294)
  Add Invoke-DevOpsAPI.ps1, Add functions for Canceling and Listing Builds (Azure#15013)
  The original one is removed. Point to the new one (Azure#15287)
  Sync eng/common directory with azure-sdk-tools for PR 1170 (Azure#15087)
  Adding OpenTelemetry exporter code (Azure#14784)
  update external link (Azure#15273)
  Remove invalid characters in basename sourced from username (Azure#15268)
  Sync eng/common directory with azure-sdk-tools for PR 1188 (Azure#15267)
  Increment version for core releases (Azure#15269)
  Increment package version after release of azure_identity (Azure#15266)
  Fix CI (Azure#15265)
  Increment package version after release of azure_eventgrid (Azure#15262)
  ...

Add MySQL swagger files for GA stable version 2021-05-01 (Azure#15289)

* Copy the existing version 2021-05-01-preview into stable directory 2021-05-01

* Update api-version

* Update readme

* Fix go readme

* Correct the api-version in examples

* Remove server.identity as is was currently not supported

* Update readme to support multi API

* change the default package to single server in readme