@Test
  public void testFairness() throws Exception {
    testFairness(false);
  }
This test is mostly obsolete.  The logic in the Driver.java no longer acquires any locks for
"show tables".  Keeping the test for now in case we change that logic.
ql/src/test/org/apache/hadoop/hive/ql/lockmgr/TestDbTxnManager2.java