transform json from Ariane server to local object
        :param json_obj: json from Ariane Server
        :return: transformed cluster

def json_2_cluster(json_obj):
        """
        transform json from Ariane server to local object
        :param json_obj: json from Ariane Server
        :return: transformed cluster
        """
        LOGGER.debug("Cluster.json_2_cluster")
        return Cluster(
            cid=json_obj['clusterID'],
            name=json_obj['clusterName'],
            containers_id=json_obj['clusterContainersID'],
            ignore_sync=True
        )