private void stopServersAndDeleteDirectories() {
    for (Map.Entry<Integer, String> entry : SERVER_ZONE_MAP.entrySet()) {
      clusterStartupRule.stop(entry.getKey(), true);
    }
    cleanOutServerDirectories();
  }
This test tests the case that we don't accidentally leave extra copies in a
redundancy zone after a server recovers.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/control/RebalanceOperationComplexDistributedTest.java