refs https://github.com/TryGhost/Toolbox/issues/116
- Allows to have deterministic routing on each start of the instance - can use cache when starting tests
- To make use of the new fixtures need to place them in the content/data
folder when the test suite is initialized, then the cache detection will
kick in and boot up the UrlService in a constant time intead of having
to check "urlServiceUtils.isFinished"
