private Map<String, Integer> countNodeStatus(final Map<Integer, String> nodeStatus) {
    final Map<String, Integer> result = new HashMap<>();
    nodeStatus.values().forEach(status -> result.put(status, result.getOrDefault(status, 0) + 1));
    return result;
  }
This config object stores the properties set by developers during the test. It will be cleared
after each call of cleanupEnvironment.
integration-test/src/main/java/org/apache/iotdb/it/env/cluster/env/AbstractEnv.java