Author: Stefan Hanauska
MDL-86507 badge: Check if role is assigned
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4e47698ca916da6acd48e2b404bbf524aa46b789
http://github.com/moodle/moodle/commit/4e47698ca916da6acd48e2b404bbf524aa46b789
+ 4.1 en [wrongrole,core_badges]