@Override
  public void close() {
  }
Construct a DcInfo object with the given parameters.
@param dcName the associated datacenter name.
@param dcZkInfo the {@link ClusterMapUtils.DcZkInfo} associated with the DC.
@param clusterChangeHandler the associated {@link HelixClusterChangeHandler} for this datacenter.
ambry-clustermap/src/main/java/com/github/ambry/clustermap/DcInfo.java