Have a basic Hibernate 2LC caching implementation (local caching only)

[Sanne]

Hibernate ORM is best used in combination with a 2LC.

Ideally we'll want to port the Infinispan cache to Protean, which supports also distributed caches and transactional modes - but that's a stretch for a first step.

So let's work with @galderz to have a local cache first, which incidentally allows for various special optimisations.

In a future step Galder's work might evolve to be a foundation for:

1. fully distributed Infinispan Cache support
2. local caching features exposed to other components, or even end user's code (JCache ?)

[Sanne]

This is done