Update `GitlabCeRelease` spec to use only local repositories
Depends on https://gitlab.com/gitlab-org/release-tools/merge_requests/39
This drastically speeds up the test because we no longer perform a remote clone of the test repositories.
release-tools rs-release-fixture-repo % be rspec spec/lib/release/gilab_ce_release_spec.rb
Run options: include {:focus=>true}
All examples were filtered out; ignoring {:focus=>true}
Randomized with seed 38889
8< ---------- tons of output ---------- 8<
Finished in 4.97 seconds (files took 0.38784 seconds to load)
8 examples, 0 failures