Add "no_ack" consumer option (feature request)

[andrey-tech]

Hello!

Please, add important configuration option for consumer no_ack. If set to true, automatic acknowledgement mode will be used by consumer. The default value is false.

We really need this option on our large project at the moment, but no_ack value is hardcoded to false in method setupConsumer() of classes:

• OldSound\RabbitMqBundle\RabbitMq\BaseConsumer,
• OldSound\RabbitMqBundle\RabbitMq\BatchConsumer,
• OldSound\RabbitMqBundle\RabbitMq\MultipleConsumer.

E.g. https://github.com/php-amqplib/RabbitMqBundle/blob/master/RabbitMq/BaseConsumer.php#L71

        $this->getChannel()->basic_consume($this->queueOptions['name'], $this->getConsumerTag(), false, false, false, false, [$this, 'processMessage']);

[andrey-tech]

@mihaileu Do you accept PR now? Аny chance to include the changes from my PR to your new release in the next month?

[mihaileu]

looking into

[mihaileu]

thx for your support, new tag was created: 2.13.0