message: added druid dimensions for external and db calls
diff: "ServiceName",
  "References",
  "Tags",
  + "ExternalHttpMethod",
  + "ExternalHttpUrl",
  + "Component",
  + "DBSystem",
  + "DBName",
  + "DBOperation",
  + "PeerService",
  {
  "type": "string",
  "name": "TagsKeys",
  