message: added FileHash entity to groupByEntities list
diff: "Account",
  "Host",
  "Ip",
  - "Url"
  + "Url",
  + "FileHash"
  ],
  "type": "string",
  "x-ms-enum": {
  {
  "description": "Url entity",
  "value": "Url"
  + },
  + {
  + "description": "FileHash entity",
  + "value": "FileHash"
  }
  ]
  }
  