Author: Andrew Nicols
MDL-62047 core_userkey: Add privacy implementation
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1444ea075e9e673238e10bf2df1849dd8d3f71c8
http://github.com/moodle/moodle/commit/1444ea075e9e673238e10bf2df1849dd8d3f71c8
+ 3.4 en [privacy:metadata:user_private_key:script,core_userkey]
+ 3.4 en [privacy:metadata:user_private_key:value,core_userkey]
+ 3.4 en [privacy:metadata:user_private_key:userid,core_userkey]
+ 3.4 en [privacy:metadata:user_private_key:instance,core_userkey]
+ 3.4 en [privacy:metadata:user_private_key:iprestriction,core_userkey]
+ 3.4 en [privacy:metadata:user_private_key:validuntil,core_userkey]
+ 3.4 en [privacy:metadata:user_private_key:timecreated,core_userkey]
+ 3.4 en [privacy:metadata:user_private_key,core_userkey]