Update elasticsearch river conf example to use rabbitmq
Update elasticsearch river conf example to use rabbitmq

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