Use autocommit for mysql data store to improve performance.
Remove loadCodable endpoint to let consumers do the serialization themselves
Fix JobConfigManager/QueryConfigWatcher to use SpawnDataStore more consistently.
create new 'event-jobs' data file for tracking job state transitions
Initial commit of reservoir data attachment.

Unit tests provided. Needs to be tested in an actual job.
Also needs documentation.
Implement encoding/decoding for reservoir.

BytesCodable interface for reservoir data attachment.
Merge branch 'data-reservoir' of github.com:addthis/hydra into data-reservoir

Conflicts:
	hydra-data/src/main/java/com/addthis/hydra/data/tree/prop/DataReservoir.java
	hydra-data/src/test/java/com/addthis/hydra/data/tree/prop/DataReservoirTest.java