Title of MR created for branch `issue-title-123` should be 'Resolve "Issue title"'
Since https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/2808, the description is already set to "Closes #123 (closed)", but in case we cannot set the title based on a commit (if there is more than 1 commit in the branch, for example), we should set the title to 'Revert "Issue title"' instead of the "Issue title 123" you'll get now.
cc @zj