wrap up deprecated dialoghelper and improvement on process/helper/builder

The `ChoiceQuestion` expects the value, not the key. So this will indeed not work.

http://symfony.com/doc/current/components/console/helpers/questionhelper.html#let-the-user-choose-from-a-list-of-answers

You can fix this with `$authenticationLabels[0]`, to get the key of a value use `array_search()`