Fix linkfication of tests for the mozmill-tests refactoring and workspace feature (#73)

This fixes the issue as reported in issue #73. I pushed this change to staging for reference and testing:

http://mozmill-staging.blargon7.com/#/functional/report/456bebe92845279408c15c03e8c43b7e

I'm not sure if it makes sense to keep backward compatibility, given that reports will be outdated kinda quickly and not needed anymore.