Author: Aaron Barnes
MDL-32249 completion: Round course grades and remove hardcoded string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=412cecc32bd33b108008791090f420b6892b4cac
http://github.com/moodle/moodle/commit/412cecc32bd33b108008791090f420b6892b4cac
+ 2.3 en [gradetopass,core_completion]