Include Devise::Test::IntegrationHelpers for all feature specs

spec/spec_helper.rb

@@ -44,6 +44,7 @@ RSpec.configure do |config|
   config.include Devise::Test::ControllerHelpers, type: :controller
   config.include Devise::Test::ControllerHelpers, type: :view
+  config.include Devise::Test::IntegrationHelpers, type: :feature
   config.include Warden::Test::Helpers, type: :request
   config.include LoginHelpers, type: :feature
   config.include SearchHelpers, type: :feature