E2E test for Remote repository pull mirroring with SSH auth
There's an old MR started for push mirroring: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/23284/diffs
Should be able to modify it for pull mirroring.
Docs: https://docs.gitlab.com/ee/workflow/repository_mirroring.html
Related epic: gitlab-org&1669
Edited by Mark Lapierre