Author: Zig Tan
MDL-61881 report_log: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=219c1360039f45e235dbcb6892faa080dc76e20a
http://github.com/moodle/moodle/commit/219c1360039f45e235dbcb6892faa080dc76e20a
+ 3.5 en [privacy:metadata,report_log]