@Override
    public boolean equals(Object other) {
      if (this == other) {
        return true;
      }
      if (!(other instanceof ClusterID)) {
        return false;
      }
      return toString().equalsIgnoreCase(other.toString());
    }
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