What does this MR do?
github.com/docker/docker/pkg/stdcopy.StdCopy() while handling docker output.
Why was this MR needed?
Fixes regression introduced with !301 (merged). Please read https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/merge_requests/301#note_24583712 for a reference.
Thanks @ayufan for pointing to this function :)
Are there points in the code the reviewer needs to double check?
Does this MR meet the acceptance criteria?
Added for this feature/bug
All builds are passing
Branch has no merge conflicts with
master(if you do - rebase it please)