[bug 1038211] Optimize legacy vouches /admin filter.
[bug 1038211] Optimize legacy vouches /admin filter.

ChristineLaMuse/mozillians,anistark/mozillians,justinpotts/mozillians,safwanrahman/mozillians,chirilo/mozillians,chirilo/mozillians,hoosteeno/mozillians,akatsoulas/mozillians,mozilla/mozillians,fxa90id/mozillians,brian-yang/mozillians,justinpotts/mozillians,fxa90id/mozillians,safwanrahman/mozillians,fxa90id/mozillians,brian-yang/mozillians,anistark/mozillians,brian-yang/mozillians,fxa90id/mozillians,akarki15/mozillians,akatsoulas/mozillians,akarki15/mozillians,johngian/mozillians,safwanrahman/mozillians,mozilla/mozillians,akarki15/mozillians,brian-yang/mozillians,justinpotts/mozillians,akatsoulas/mozillians,justinpotts/mozillians,akatsoulas/mozillians,johngian/mozillians,chirilo/mozillians,safwanrahman/mozillians,hoosteeno/mozillians,akarki15/mozillians,hoosteeno/mozillians,ChristineLaMuse/mozillians,mozilla/mozillians,hoosteeno/mozillians,anistark/mozillians,chirilo/mozillians,mozilla/mozillians,ChristineLaMuse/mozillians,johngian/mozillians,anistark/mozillians,johngian/mozillians