Add the metrics of replication sources which were transformed from other dead rs to ReplicationLoad

  private void buildReplicationLoad() {
    // get source
    List<ReplicationSourceInterface> sources = this.replicationManager.getSources();
    List<MetricsSource> sourceMetricsList = new ArrayList<MetricsSource>();

    for (ReplicationSourceInterface source : sources) {
      if (source instanceof ReplicationSource) {
        sourceMetricsList.add(((ReplicationSource) source).getSourceMetrics());
      }
    }

    // get sink
    MetricsSink sinkMetrics = this.replicationSink.getSinkMetrics();
    this.replicationLoad.buildReplicationLoad(sourceMetricsList, sinkMetrics);
  }