Devise deprecation warning
As seen in https://gitlab.com/gitlab-org/gitlab-ce/builds/8662415:
DEPRECATION WARNING: [Devise] including `Devise::TestHelpers` is deprecated and will be removed from Devise.
For controller tests, please include `Devise::Test::ControllerHelpers` instead.
(called from include at /builds/gitlab-org/gitlab-ce/spec/views/ci/lints/show.html.haml_spec.rb:4)