Author: Sara Arjona
MDL-61957 gradereport_overview: Implement privacy API
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f79f0b5975908363f72fe7a4435209f19fd1392d
http://github.com/moodle/moodle/commit/f79f0b5975908363f72fe7a4435209f19fd1392d
+ 3.3 en [privacy:metadata,gradereport_overview]