Author: Jonathan Champ
MDL-29572 Grade Import: Avoid creating invalid temporary rows; Provide feedback on error
http://git.moodle.org/gw?p=moodle.git;a=commit;h=37701d203833cb638c9a9ee50f72dca250f49534
http://github.com/moodle/moodle/commit/37701d203833cb638c9a9ee50f72dca250f49534
+ 2.5 en [errorsettinggrade,core_grades]
+ 2.5 en [gradeimportfailed,core_grades]
+ 2.5 en [usermappingerror,core_grades]
+ 2.5 en [usermappingerrorusernotfound,core_grades]
+ 2.5 en [usermappingerrorcurrentgroup,core_grades]