transform this local object ot Ariane server JSON object
        :return: the JSON object

def cluster_2_json(self):
        """
        transform this local object ot Ariane server JSON object
        :return: the JSON object
        """
        LOGGER.debug("Cluster.cluster_2_json")
        json_obj = {
            'clusterID': self.id,
            'clusterName': self.name,
            'clusterContainersID': self.containers_id
        }
        return json_obj