@AfterClass
  public static void tearDown() throws Exception {
    util.shutdownMiniCluster();
  }
Simple Tests to check whether the durability of the Mutation is changed or not, for
{@link TableOutputFormat} if {@link TableOutputFormat#WAL_PROPERTY} is set to false.
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableOutputFormat.java