@After
  public void tearDown() throws Exception {
    invokeInEveryVM(() -> {
      spyCacheListener = null;
    });
  }
Client queue size statistic should not go negative when client goes offline.

<p>
TRAC #48571: CacheClientProxy.getQueueSizeStat() gives negative numbers when client goes down.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ha/HARegionQueueSizeRegressionTest.java