Fix duplicate Traefik headers
see #3047 (closed)
note: header deletion is not supported by Traefik so I removed these headers and associated tests from the response
This Gitlab instance will be unavailable from Saturday 18th of May at 17:00 PM to Sunday 19th of May at 10:00 AM.
We are progressively migrating our services onto a new virtual machine, and as Gitlab is one of our most important service, we will proceed with care, hence the extended unavailability.
All gitlab webpages ( *.ow2.io ) will also be unavailable, gitlab-runners as well.
Thanks for your understanding.
see #3047 (closed)
note: header deletion is not supported by Traefik so I removed these headers and associated tests from the response