@AfterClass
  public static void tearDown() throws Exception {
    Closeables.close(CONN, true);
    UTIL.shutdownMiniCluster();
  }
Testcase to make sure that we always set scanner id in ScanResponse. See HBASE-18000.
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAlwaysSetScannerId.java