Author: Aaron Barnes
MDL-32249 completion: Round course grades and remove hardcoded string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b795d69cc307e353dc50b0f4669a160b85334424
http://github.com/moodle/moodle/commit/b795d69cc307e353dc50b0f4669a160b85334424
+ 2.2 en [gradetopass,core_completion]