@AfterClass
  public static void tearDown() throws Exception {
    UTIL.shutdownMiniCluster();
  }
Testcase to make sure that we do not close scanners if ScanRequest.numberOfRows is zero. See
HBASE-18042 for more details.
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestScanWithoutFetchingData.java