@Override
  public synchronized void cleanup() {
    for (T lc : this.cleanersChain) {
      try {
        lc.stop("Exiting");
      } catch (Throwable t) {
        LOG.warn("Stopping", t);
      }
    }
  }
Delete the given files
@param filesToDelete files to delete
@return number of deleted files
hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/CleanerChore.java