Remove duplicate tests for finding documents by identity
Remove duplicate tests for finding documents by identity

I've also prefixed these tests with .published_as to make it clearer they are all testing the same method.

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