Acknowledge the message delivery from RabbitMQ.

        :param int delivery_tag: The delivery tag from the Basic.Deliver frame

def acknowledge_message(self, delivery_tag):
        """Acknowledge the message delivery from RabbitMQ.

        :param int delivery_tag: The delivery tag from the Basic.Deliver frame
        """
        logger.debug('Acknowledging message %s', delivery_tag)
        self._channel.basic_ack(delivery_tag)