Author: Tim Hunt
MDL-74610 quiz: multiple grades - add grade item
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6794f1293f130b7dffe7f5445e52c4dfc535ec00
http://github.com/moodle/moodle/commit/6794f1293f130b7dffe7f5445e52c4dfc535ec00
+ 4.4 en [gradeitemdefaultname,mod_quiz]