WL-1445 Make sure MessageBundleService doesn't stop shutdown.

When you use auto wiring this bean ends up getting started up, but because of it's non-daemon time wouldn't shutdown. It's been re-written in never versions of Sakai but this is a simple fix for us.
Merge pull request #9 from ox-it/WL-1445

WL-1445 Make sure MessageBundleService doesn't stop shutdown.