Updated spring configurations to reflect fcrepo4 changes.
Merge pull request #3 from mikedurbin/shutdown-hook

Updated spring configurations to reflect fcrepo4 changes.

Follow-on update to: https://www.pivotaltracker.com/story/show/66454096
and
https://github.com/fcrepo4/fcrepo4/commit/4762faad225f4cd3880e17fc1c60d6f782051c54