OGM-481 Incorporating review remarks
OGM-264 Creating specific key type for id generators, passing this to GridDialect#nextValue()
OGM-264 Removing obsolete method
OGM-264 Using provided value colum name for id generator in MongoDB
OGM-264 Extracting common base for OgmTableGenerator and OgmSequenceGenerator
OGM-264 Adding support for sequence-based id generation with Neo4j
OGM-264 Don't implement SQL-specific PersistentIdentifierGenerator interface
OGM-264 Making sure id generator keys can be serialized/deserialized with Infinispan