Restore support for custom environment variables
Fixes something we broke in https://gitlab.com/gitlab-org/gitaly/merge_requests/306
The env optional argument slice was being ignored.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fixes something we broke in https://gitlab.com/gitlab-org/gitaly/merge_requests/306
The env optional argument slice was being ignored.