Add CI env var
This allows the QA framework to disable some features when not in CI, e.g., rspec-retry.
Required for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/28163
This allows the QA framework to disable some features when not in CI, e.g., rspec-retry.
Required for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/28163