David Sutherland

Use MessagePack for serialization

2

Currently we are using json for data serialization to/from [kafka topics](https://github.com/ExpediaDotCom/adaptive-alerting/blob/8d108c858f0aaadf10291c18277673b0726a2955/kafka/src/main/java/com/expedia/adaptivealerting/kafka/serde/JsonPojoSerde.java). We should have the option of using MessagePack throughout the system as it has performance benefits and it makes...