Author: Sara Arjona
MDL-61957 gradereport_overview: Implement privacy API
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c2ea064a309bea6f94f775bd0567340dc1978be9
http://github.com/moodle/moodle/commit/c2ea064a309bea6f94f775bd0567340dc1978be9
+ 3.4 en [privacy:metadata,gradereport_overview]