Wait for all Vue resources to finish in merge immediately spec

spec/features/merge_requests/merge_immediately_with_pipeline_spec.rb

@@ -39,7 +39,7 @@ feature 'Merge immediately', :feature, :js do
           expect(find('.accept-merge-request.btn-info')).to have_content('Merge in progress')
-          wait_for_ajax
+          wait_for_vue_resource
         end
       end
     end