OGM-469 Caching AssocationTypeContext instances in collection persister
OGM-625 Avoiding round-trip to the datastore in MongoDBDialect#createAssociation()
OGM-469 Exposing the entity on the current side of an association via AssociationContext
OGM-469 Avoiding re-read of the entity document when retrieving embedded associations
OGM-469 Making sure entity extra state does not get lost when using identity id generation strategy
OGM-469 Adding test for deletion of transient entity and @NotFound