Revert "An interrupt exception (Ctrl-C) should stop the tests running."
Revert "An interrupt exception (Ctrl-C) should stop the tests running."

This reverts commit e7d2f4b100103ac11b93e59027c3ce8c9a83a04f.

After accepting this commit, I found that doing rake db:migrate would fail

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