private static void awaitLatch(AtomicReference<CountDownLatch> latch)
      throws InterruptedException {
    latch.get().await(TIMEOUT_MILLIS_LONG, MILLISECONDS);
  }
Stops the cache server specified by port
geode-cq/src/distributedTest/java/org/apache/geode/internal/cache/PutAllClientServerDistributedTest.java