@AfterClass
  public static void tearDownAfterClass() throws Exception {
    Closeables.close(CONN, true);
    TEST_UTIL.shutdownMiniCluster();
  }
Make puts to put the input value into each combination of row, family, and qualifier
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScannerHeartbeatMessages.java