Docs: Update all articles with the new layout (metadata from the frontmatter)
See the general Documentation guidelines http://docs.gitlab.com/ce/development/doc_styleguide.html
What does this MR do?
- Ports https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/17187 to EE
- Adds metadata to the EE-only article
Edited by 🤖 GitLab Bot 🤖