public static VcrServer createVcrServer(VerifiableProperties properties, ClusterAgentsFactory clusterAgentsFactory,
      NotificationSystem notificationSystem, CloudDestinationFactory cloudDestinationFactory) {
    return new VcrServer(properties, clusterAgentsFactory, notificationSystem, cloudDestinationFactory, null);
  }
Create a {@link com.github.ambry.vcr.VcrServer}.
@param properties the config properties to use.
@param clusterAgentsFactory the {@link ClusterAgentsFactory} to use.
@param notificationSystem the {@link NotificationSystem} to use.
@param cloudDestinationFactory the {@link CloudDestinationFactory} to use.
@return the created VCR server.
ambry-vcr/src/test/java/com/github/ambry/vcr/VcrTestUtil.java