- add java launcher to work around JRUBY-6015. (LOGSTASH-158)
- add java launcher to work around JRUBY-6015. (LOGSTASH-158)

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