@After
  public void cleanup() {
    try {
      logger.info("Start to clean up.");
      mockCluster.cleanup();
      helixControllerManager.syncStop();
      zkInfo.shutdown();
    } catch (Throwable t) {
      logger.error("Failed to cleanup due to {}", t);
    }
  }
Run for both onlineoffline and leaderstandby state models.
@return an array with factory class and state model names for both the state models.
ambry-vcr/src/test/java/com/github/ambry/vcr/VcrBackupTest.java