allow access at registration time to be able to the runner active: false
Description
We should add another improvement that will set active: false attribute for a registered Runner on GitLab's side. But this would need first an update in GitLab CI API in here https://gitlab.com/gitlab-org/gitlab-ce/blob/v8.15.0/lib/ci/api/runners.rb#L32.
Proposal
--active=false or --active=true ( default)
Links to related issues and merge requests / references
Please paste a link of the related issues or/and merge requests