Add GitLab user service
Add GitLab user service
Part of https://gitlab.com/gitlab-org/gitter/webapp/issues/2393
Split off from https://gitlab.com/gitlab-org/gitter/webapp/merge_requests/1702
Added for the gitlab-uri-validator
(see https://gitlab.com/gitlab-org/gitter/webapp/merge_requests/1706) to fetch GitLab user info given a URI
Edited by Eric Eastwood