revert to the earlier netty version while investigating some things
revert to the earlier netty version while investigating some things

avranju/qpid-jms,andrew-buckley/qpid-jms,gemmellr/qpid-jms,andrew-buckley/qpid-jms,tabish121/qpid-jms,avranju/qpid-jms,gemmellr/qpid-jms,tabish121/qpid-jms,apache/qpid-jms,apache/qpid-jms