@Override
    public int hashCode() {
      return toString().hashCode();
    }
This creates a new ClusterID wrapper that will automatically build connections and
configurations to be able to talk to the specified cluster
@param base the base configuration that this class will add to
@param key  the cluster key in the form of zk_quorum:zk_port:zk_parent_node
hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestReplication.java