Author: Zig Tan
MDL-61567 mod_page: Implement null provider mod_page
http://git.moodle.org/gw?p=moodle.git;a=commit;h=121638b23f9eba52a8c509674e6b3829a0749b28
http://github.com/moodle/moodle/commit/121638b23f9eba52a8c509674e6b3829a0749b28
+ 3.5 en [privacy:metadata,mod_page]