use auth keys from scope instead of global config
use I18n "support.array.words_connector" as connector
code cleanup FailureApp
Merge pull request #3221 from timoschilling/auth_keys_text

fix and optimice authentication_keys
Merge `swap` usage into a single method call.
Revert "Removes reloading of routes when eager loading ..."
Merge pull request #3241 from plataformatec/revert-3195-master

Revert "Removes reloading of routes when eager loading ..."
Merge branch 'master' into lm-rails-4-2