Fix tests which relied upon rummager policies
Fix tests which relied upon rummager policies

The policies are now featured in the database and no longer require
rummager. Update the tests to get the policies from content register.

ggoral/whitehall,alphagov/whitehall,hotvulcan/whitehall,robinwhittleton/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,askl56/whitehall,YOTOV-LIMITED/whitehall,ggoral/whitehall,askl56/whitehall,YOTOV-LIMITED/whitehall,robinwhittleton/whitehall,robinwhittleton/whitehall,alphagov/whitehall,robinwhittleton/whitehall,hotvulcan/whitehall,hotvulcan/whitehall,alphagov/whitehall,hotvulcan/whitehall,askl56/whitehall,askl56/whitehall,alphagov/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall