Change log:
5bbf9dd (5.1.x) Improve MessageKryoRegistrar for registrations
7b680ef Upgrade dependencies; prepare for release
50f196d Fix typo in KryoCodecTests
fcb8caf Improve Kryo Codec for registrations
35ea268 GH-3348: Upgrade to MQTT Paho-1.2.4
8df8028 Fix CachedSessionFactory Race
