@Override
  public void addRemoteReplicaInfo(RemoteReplicaInfo rinfo) {
    String msg = String.join(BackupCheckerFileManager.COLUMN_SEPARATOR,
        "datetime",
        "blob_state_match_status",
        "server_blob_state",
        "azure_blob_state",
        "\n");
    fileManager.truncateAndWriteToFile(getFilePath(rinfo, BLOB_STATE_MISMATCHES_FILE), msg);
    super.addRemoteReplicaInfo(rinfo);
  }
Add a replica to be copied from server.
Additionally, clears some local files to store results and calls parent method.
@param rinfo {@link RemoteReplicaInfo} to add.
ambry-replication/src/main/java/com/github/ambry/replication/BackupCheckerThread.java