Remove deep copies of FinalizedReplica to alleviate heap consumption on DataNode

    try(AutoCloseableLock lock = dataset.acquireDatasetLock()) {
      for (Entry<String, ScanInfo[]> entry : diskReport.entrySet()) {
        String bpid = entry.getKey();
        ScanInfo[] blockpoolReport = entry.getValue();
        
        Stats statsRecord = new Stats(bpid);
        stats.put(bpid, statsRecord);
        LinkedList<ScanInfo> diffRecord = new LinkedList<ScanInfo>();
        diffs.put(bpid, diffRecord);
        
        statsRecord.totalBlocks = blockpoolReport.length;
        List<ReplicaInfo> bl = dataset.getFinalizedBlocks(bpid); /* deep copies here*/

  public List<ReplicaInfo> getFinalizedBlocks(String bpid) {
    try (AutoCloseableLock lock = datasetLock.acquire()) {
      ArrayList<ReplicaInfo> finalized =
          new ArrayList<ReplicaInfo>(volumeMap.size(bpid));
      for (ReplicaInfo b : volumeMap.replicas(bpid)) {
        if (b.getState() == ReplicaState.FINALIZED) {
          finalized.add(new ReplicaBuilder(ReplicaState.FINALIZED)
              .from(b).build()); /* deep copies here*/
        }
      }
      return finalized;
    }
  }