Merge pull request #108 from escowles/updated-ns-uris

Updating namespace URIs to match published ontologies
Polish StoragePolicy API and tests

Resolves: https://www.pivotaltracker.com/story/show/55399322
* Change REST API endpoint to use {path}/fcr:storagepolicy
* Add API for GET-ing a specific storage policy
* Add more unit and integration tests
* Add @Timed annotations
* Stop stacktraces from reaching the user