fix content rating modified time not set on update
switch germany to use usk content ratings over generic
fix content rating test after switching germany to usk
Restrict appversion changes to a new group(bug 727112)
Merge pull request #1580 from hardikj/master

Restrict appversion changes to a new group(bug 727112)
Bug 941150: Support preference reset in the blocklist service
Merge pull request #1423 from kmaglione/blocklist-pref-reset

Bug 941150: Support preference reset in the blocklist service