Update GitLab Mattermost docs for MM v4.2, GitLab v10.0 (!1933) · Merge requests · GitLab.org / omnibus-gitlab · GitLab

Do not update/delete: Banner broadcast message test data

Do not update/delete: Notification broadcast message test data

username-removed-570793 requested to merge jasonblais/omnibus-gitlab:patch-9 into master Sep 15, 2017

Update GitLab Mattermost docs for MM v4.2, GitLab v10.0.

See PR that adds MM v4.2 to GitLab v10.0: https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/1932