[EE] Update Ruby version to 2.3.6 (!3848) · Merge requests · GitLab.org / GitLab · GitLab

Rémy Coutable requested to merge ee-41268-bump-ruby-to-2-3-6 into master Dec 20, 2017

EE MR for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/16016