message: Add deleteFilesAfterCompletion to HDFS source
diff: "distcpSettings": {
  "description": "Specifies Distcp-related settings.",
  "$ref": "#/definitions/DistcpSettings"
  + },
  + "deleteFilesAfterCompletion": {
  + "type": "object",
  + "description": "Indicates whether the source files need to be deleted after copy completion. Default is false. Type: boolean (or Expression with resultType boolean)."
  }
  }
  },
  