@Test
  public void testExternalTable() throws Exception {
    LOG.info("Running " + name.getMethodName());
    testUtil("true", true, false, false, name.getMethodName());
  }
Tests if the auto.purge property works correctly for external tables. Old data should skip
trash when insert overwrite table .. is run when auto.purge is set to true

@throws Exception
itests/hive-unit/src/test/java/org/apache/hadoop/hive/ql/TestAutoPurgeTables.java