Feature tests for testing Auto DevOps itself

Problem

We run package-and-qa manually on each MR (there's also nightly Quality runs)

It will be great to have a much faster feedback loop and tests that are consistently run on each MR

Further details

E.g. Could we have caught https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/23826 earlier ?

Proposal

Write feature specs

• Probably needs mocked cluster
• Test project