"signatures" did not exist on "49be5365d0a634b4a49ee315b21cc10e77ba2985"
Merge branch 'restore-hipchat-11-9' into '11-9-stable'
[11.9] Revert "Remove HipChat integration from GitLab" See merge request gitlab-org/gitlab-ce!27257
[11.9] Revert "Remove HipChat integration from GitLab" See merge request gitlab-org/gitlab-ce!27257