Switching to use the new `moduleForAcceptance` helper
Switching to use the new `moduleForAcceptance` helper

The latest `ember-cli` (`1.13.12`) provides a `moduleForAcceptance` helper. This PR updates the guides to use it.
nicobot/guides,boztek/guides,knownasilya/guides,vikram7/guides,jkarsrud/guides,MarkMT/guides,knownasilya/guides,ubuntuvim/guides,tleskin/guides,davidpett/guides,MarkMT/guides,nicobot/guides,skaterdav85/guides,jkarsrud/guides,greyhwndz/guides,ubuntuvim/guides,jackfranklin/guides,ubuntuvim/guides,boztek/guides,boztek/guides,HeroicEric/guides,knownasilya/guides,davidpett/guides,tleskin/guides,skaterdav85/guides,skaterdav85/guides,bmac/guides,HeroicEric/guides,tleskin/guides,bmac/guides,jkarsrud/guides,ubuntuvim/guides,MarkMT/guides,bmac/guides,davidpett/guides,vikram7/guides,greyhwndz/guides,jackfranklin/guides,HeroicEric/guides,MarkMT/guides,jackfranklin/guides,knownasilya/guides,skaterdav85/guides,nicobot/guides,davidpett/guides,greyhwndz/guides,vikram7/guides,bmac/guides,jkarsrud/guides