Fix typo (#461)

RestartConsumerException  -> StopConsumerException

Author: viniciusss

RabbitMq/Exception/StopConsumerException.php

@@ -7,7 +7,7 @@
  * If this exception is thrown in consumer service the message
  * will not be ack and consumer will stop
  * if using demonized, ex: supervisor, the consumer will actually restart
- * Class RestartConsumerException
+ * Class StopConsumerException
  * @package OldSound\RabbitMqBundle\RabbitMq\Exception
  */
 class StopConsumerException extends \RuntimeException