@Test
  public void testSpecifiedNumOfMappersMR()
    throws InterruptedException, IOException, ClassNotFoundException {
    testNumOfSplitsMR(2, 52);
    testNumOfSplitsMR(4, 104);
  }
Runs a MR to test TIF using specific number of mappers. The test table has 26 regions,
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableInputFormatScan.java