[#3920] - Modify Jasper to use hibernate caching to improve performance problems

See post on forum, entitled "report flow & schedule flow performance problems" http://jasperforge.org/plugins/espforum/view.php?group_id=112&forumid=10... This addresses issue (2) on the forumn.

If jasper were to use hibernate caching, I think jasper would have a big performance improvement on many pages. I see mutliple loads of the same objects which haven't change since the last time they were loaded. For example the same RepoUser will be loaded several times when creating input control wrappers. This problem is compoused by the other