@Override
  public void setConf(Configuration configuration) {
    conf = configuration;
    txnHandler = TxnUtils.getTxnStore(conf);
  }
Cleaner for the {@link MaterializationsRebuildLockHandler}. It removes outdated locks
in the intervals specified by the input property.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/MaterializationsRebuildLockCleanerTask.java