Extract generation of role appointments attributes.
Extract generation of role appointments attributes.

To reduce duplication and improve the signal-to-noise ratio in the tests.

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