Author: Andrew Nicols
MDL-66079 assign: Switch to new gradeitem API
Part of MDL-66074
http://git.moodle.org/gw?p=moodle.git;a=commit;h=629726dd3f7bea10bc81774bbce2cc10497cbc59
http://github.com/moodle/moodle/commit/629726dd3f7bea10bc81774bbce2cc10497cbc59
+ 3.8 en [gradeitem:submissions,mod_assign]
- 3.8 en [submissions,mod_assign]