reverted the initializer back to what is in logstash mainline
reverted the initializer back to what is in logstash mainline

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