…f returning null

Modify such that accessing an unloaded property throws a LazyInitialisationException. This includes ToMany collections that where previously initialised as empty collections (that didn't lazy load).

This change brings the disableLazyLoad behaviour in line with the unmodifiable behaviour.

It does mean that the use case of bulk mapping from entities to DTOs via something like MapStruct will no longer work nicely (mapping nulls and empty lists versus LazyInitialisationException).

…utable-DisabledLazyLoad

Modify disableLazyLoad to throw LazyInitialisationException instead o…