refactor Blubber route, refs #4554

git-svn-id: svn://develop.studip.de/studip/trunk@31985 c5b85792-5220-0410-ad23-ed5b6b8ad999
activate Blubber route, fixes #4554

git-svn-id: svn://develop.studip.de/studip/trunk@31986 c5b85792-5220-0410-ad23-ed5b6b8ad999