Pulling PersistentObjectCache out of DbSqlSession, bringing it to the same level (a Session implementation).
Next stop is making the EntityManagers engine static (now they are session instantiated) and extracting an interface for the DbSqlSession.

(work in progress) Moving logic from entities into EntityManager classes. Removing unneeded methods and consolidating almost similar logic.

Fixing the FullHistoryTest: refactoring the way HistoricActivityInstances are looked up (still needs to be moved to the entity manager), creating one if one is not found (to solve the order problem).

Fix for HistoricFormProperty test. This took me way longer than I'd hoped (history needs cleanup though!)

Format back to 2 spaces for now, merging back from Activiti 5 is really an issue with spacing differences

Fix process deletion, consolidating process delete methods in ExecutionEntityManager (still needs some love probably)