message: Add optional location property to patch body.
diff: "identity": {
  "$ref": "#/definitions/Identity",
  "description": "The identity of the Azure Health Bot."
  + },
  + "location": {
  + "type": "string",
  + "x-ms-mutability": [
  + "create",
  + "read"
  + ]
  }
  }
  },
  