message: Add alert definition navigation property to alert configuration
diff: "type": "string",
  "readOnly": false,
  "description": "The alert configuration type."
  + },
  + "alertDefinition": {
  + "$ref": "#/definitions/AlertDefinition",
  + "readOnly": true,
  + "description": "The alert definition."
  }
  },
  "required": [
  