[EE] Resolve "Store MergeWorker JID on merge request, and clean up stuck merges" (!2621) · Merge requests · GitLab.org / GitLab · GitLab

Oswaldo Ferreira requested to merge 31207-clean-locked-merge-requests-ee into master Aug 07, 2017

EE backport for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/13207