@After
  public void cleanUp() throws IOException {
    recoveryCluster.stopServers();
    vcrServer.shutdown();
    helixControllerManager.syncStop();
    zkInfo.shutdown();
  }
Shutdown the cluster.
@throws IOException on {@link IOException}
ambry-vcr/src/test/java/com/github/ambry/vcr/CloudAndStoreReplicationTest.java