Replace prometheus scrape healthchecks with prometheus counters
As part of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20565, we removed the healthcheck mechanism from the prometheus scrape endpoint.
The metrics exposed through these healthchecks should be presented via normal prometheus counters.
It's possible that this is best done via a process running on a seperate thread?
See also:
Edited by Andrew Newdigate