RE #3588 ExportAPI MVC and Migration

git-svn-id: svn://develop.studip.de/studip/trunk@26992 c5b85792-5220-0410-ad23-ed5b6b8ad999
RE #3588 ExportAPI little migration fix

git-svn-id: svn://develop.studip.de/studip/trunk@26993 c5b85792-5220-0410-ad23-ed5b6b8ad999