Author: Andrew Nicols
MDL-61307 core_rating: Add implementation of Privacy API
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c0ca1a22bfebabb62a1ce8d0ee423f634a1dd6ae
http://github.com/moodle/moodle/commit/c0ca1a22bfebabb62a1ce8d0ee423f634a1dd6ae
+ 3.4 en [privacy:metadata:rating,core_rating]
+ 3.4 en [privacy:metadata:rating:userid,core_rating]
+ 3.4 en [privacy:metadata:rating:rating,core_rating]
+ 3.4 en [privacy:metadata:rating:timecreated,core_rating]
+ 3.4 en [privacy:metadata:rating:timemodified,core_rating]