Add missing project import job example from gitlab-ee
What does this MR do?
https://gitlab.com/gitlab-org/gitlab-ee/commit/852017513dc7c2117a072bedc073ca1e39eaa442 fixed a failing spec on gitlab-ee that is relevant on gitlab-ce, but that is currently missing here. This MR brings the relevant examples. No CHANGELOG since there's no user-facing change.