@Test
  public void testWithMapReduceMultipleMappersPerRegion() throws Exception {
    testWithMapReduce(UTIL, "testWithMapReduceMultiRegion", 10, 5, 50, false);
  }
Serializes and deserializes the given scan in the same manner that TableSnapshotInputFormat
does.
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableSnapshotInputFormat.java