@Parameterized.AfterParam
  public static void after() throws Exception {
    EnvFactory.getEnv().cleanClusterEnvironment();
    tearDownEnvironment();
  }
Notice that, all test begins with "IoTDB" is integration test. All test which will start the
IoTDB server should be defined as integration test.
integration-test/src/test/java/org/apache/iotdb/db/it/schema/IoTDBCreateTimeseriesIT.java