protected void addLengthFile(Table t, Partition p, long minTxn, long maxTxn, int numRecords)
    throws Exception {
    addFile(t, p, minTxn, maxTxn, numRecords, FileType.LENGTH_FILE, 2, true);
  }
Super class for all of the compactor test modules.
ql/src/test/org/apache/hadoop/hive/ql/txn/compactor/CompactorTest.java