TK-118171 Made changes to contract, probably not final
TK-118171 DistributedDatastore interface replaced StoredElements with Serializables
TK-118171 Updated the NotifiableDatastore interface. Maybe the last one?
TK-118172 Implemented contract changes into EHCacheDatastore
TK-118172 Updated Hashring Datastore to new contracts
TK-118172 Updated ReplicatedDatastore and related classes
TK-118172 Updated all places the datastore was being called
TK-118172 Removed StoredElement and its references
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