Disable FastGettext from translating AR attrs.

It isn't working fine when using POROs in forms like WikiPage,
the following error is being raised: undefined method `abstract_class?' for Object:Class

config/application.rb

@@ -40,6 +40,9 @@ module Gitlab
     # config.i18n.default_locale = :de
     config.i18n.enforce_available_locales = false
+    # Translation for AR attrs is not working well for POROs like WikiPage
+    config.gettext_i18n_rails.use_for_active_record_attributes = false
+
     # Configure the default encoding used in templates for Ruby 1.9.
     config.encoding = "utf-8"