Get rid of mini-test related warning.
Get rid of mini-test related warning.

MiniTest::Unit::TestCase is now Minitest::Test. Make this a standard rails test
case instead of jumping through hoops to avoid loading Rails.

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