- refactor agent so it compiles under jruby 1.6.1
- refactor agent so it compiles under jruby 1.6.1

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