update version to 2.6.7-SNAPSHOT
update version to 2.6.7-SNAPSHOT

gerritjvv/kafka-fast,anujsrc/kafka-fast,gerritjvv/kafka-fast,gerritjvv/kafka-fast,anujsrc/kafka-fast,anujsrc/kafka-fast,gerritjvv/kafka-fast,anujsrc/kafka-fast