Merge branch 'fix-ci-500-on-settings' into 'master'

Fix 500 on CI project settings

Fix: https://gitlab.com/gitlab-org/gitlab-ce/issues/2546

/cc @dzaporozhets

See merge request !1321

app/views/ci/projects/edit.html.haml

 - if @project.generated_yaml_config
   %p.alert.alert-danger
-    CI Jobs are deprecated now, you can #{link_to "download", dumped_yaml_ci_project(@project)}
+    CI Jobs are deprecated now, you can #{link_to "download", dumped_yaml_ci_project_path(@project)}
     or
     %a.preview-yml{:href => "#yaml-content", "data-toggle" => "modal"} preview
     yaml file which is based on your old jobs.