@Override
  public VcrClusterSpectator getVcrClusterSpectator(CloudConfig cloudConfig, ClusterMapConfig clusterMapConfig) {
    return new HelixVcrClusterSpectator(cloudConfig, clusterMapConfig);
  }
Constructor for {@link HelixVcrClusterAgentsFactory}
@param cloudConfig {@link CloudConfig} object.
@param clusterMapConfig {@link ClusterMapConfig} object.
@param clusterMap {@link ClusterMap} object.
@param accountService {@link AccountService} object.
@param storeConfig {@link StoreConfig} object.
@param cloudDestination {@link CloudDestination} object.
@param metricRegistry  {@link MetricRegistry} object.
ambry-cloud/src/main/java/com/github/ambry/cloud/HelixVcrClusterAgentsFactory.java