@Test
  public void testEqualNumberOfPartitions() throws Exception {
    runDropPartitions(13, 13);
  }
Tests the number of times Hive.dropPartitions calls are executed with total number of
partitions exactly equal to batch size.

@throws Exception
ql/src/test/org/apache/hadoop/hive/ql/exec/TestMsckDropPartitionsInBatches.java