API helpers `find_project_merge_request` and `find_merge_request_with_access` are similar
https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2053 added the latter method but still doesn't make use of MergeRequestsFinder
, which it probably should, but I'm not sure of the implications of that.
Related: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8724