added Berksfile.lock to .gitignore
added Berksfile.lock to .gitignore

larsp/confluent-cookbook,tkrueger/confluent-cookbook,frankwis/confluent-cookbook,frankwis/confluent-cookbook,larsp/confluent-cookbook,tkrueger/confluent-cookbook,larsp/confluent-cookbook,tkrueger/confluent-cookbook,frankwis/confluent-cookbook