@Test
  public void testGetSplits() throws IOException, InterruptedException, ClassNotFoundException {
    testNumOfSplits(1, 26);
    testNumOfSplits(3, 78);
  }
Tests a MR scan using specific number of mappers. The test table has 26 regions,
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableInputFormatScan.java