Author: Zig Tan
MDL-61881 report_competency: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e9251c0fe57c219fb3472e22739172e9d1686c07
http://github.com/moodle/moodle/commit/e9251c0fe57c219fb3472e22739172e9d1686c07
+ 3.5 en [privacy:metadata,report_competency]