Author: Zig Tan
MDL-61568 repository_upload: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ec2ccabf561b3b0737363252a5eaae1ee428cdec
http://github.com/moodle/moodle/commit/ec2ccabf561b3b0737363252a5eaae1ee428cdec
+ 3.5 en [privacy:metadata,repository_upload]