Support getting the common ancestor for multiple revisions in the merge base API
After gitaly!869 (merged) & https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20929 we can now support getting the merge base for multiple revisions in the API.
After gitaly!869 (merged) & https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20929 we can now support getting the merge base for multiple revisions in the API.