added a config line for amqp attributes. this was so i could get rabbitmq mirrored queues working
added a config line for amqp attributes. this was so i could get rabbitmq mirrored queues working

joekiller/logstash-kafka,joekiller/logstash-kafka,Aloomaio/logstash-kafka,Aloomaio/logstash-kafka,opentable/logstash-kafka,opentable/logstash-kafka,tinglinux/logstash-kafka,tinglinux/logstash-kafka