Deleted "setForumBean", not needed anymore due to needle testing

Signed-off-by: Jan Galinski <jan.galinski@holisticon.de>
formatting/imports, no business logic changes

Signed-off-by: Jan Galinski <jan.galinski@holisticon.de>
After Kolloquium 2013-02-15, added needle and mockito, Unit and
Collaboration Tests for ForumController

Signed-off-by: Jan Galinski <jan.galinski@holisticon.de>