@Override
  public HadoopAggregatedData getResult() {
    return _hadoopAggregatedData;
  }
Creates a new {@code TonyMetricsAggregator}.
@param unused  Dr. Elephant expects a constructor of this form but {@code TonyMetricsAggregator} does not need this
app/com/linkedin/drelephant/tony/TonyMetricsAggregator.java