Changes to Atomically update the unified Global policy authority

added the media type application/json for the response with the status 409

added the non-success response with the status 503

added the optional property code to the response with the 400 status

added the optional property code to the response with the 401 status

added the optional property code to the response with the 403 status

added the optional property code to the response with the 500 status

endpoint added