message: Add Managed Identity envelope to SitePatchResource
  Add Managed Identity envelope to SitePatchResource object to allow PATCH identity operations to a site through Swagger
diff: }
  },
  "x-ms-client-flatten": true
  + },
  + "identity": {
  + "$ref": "./CommonDefinitions.json#/definitions/ManagedServiceIdentity"
  }
  }
  },
  