Add a no args constructor to storm-kafka's Broker and Partition classes
to enable Kryo serialization when using the storm-kafka spout
(STORM-332)
Merge branch 'STORM-332-kafka-spout-kryo-compatibility' of https://github.com/dschiavu/incubator-storm into STORM-332

STORM-332: Enable Kryo serialization in storm-kafka
Added STORM-332 to Changelog