The org.jboss.hibernate.jmx.Hibernate class has some pass-through setters for configuring a CacheProvider. Need to add equivalent for a RegionFactory.

Also need to determine what to do with org.jboss.hibernate.cache.DeployedTreeCacheProvider. It's really a second (unmaintained) version of the old legacy org.jboss.ejb3.entity.TreeCacheProviderHook stuff. Perhaps the thing to do is pull the core TreeCacheProviderHook code into an external project and have both DeployedTreeCacheProvider and TreeCacheProviderHook be trivial subclasses of a common class provided solely for legacy configuration support.