- fixed the ftw json dependency issue on json 1.6.5
- fixed the ftw json dependency issue on json 1.6.5

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