Author: Sara Arjona
MDL-61957 gradereport_overview: Implement privacy API
http://git.moodle.org/gw?p=moodle.git;a=commit;h=36b88f19aec07b6ec65952e3a36ff3d84762b943
http://github.com/moodle/moodle/commit/36b88f19aec07b6ec65952e3a36ff3d84762b943
+ 3.5 en [privacy:metadata,gradereport_overview]