An error occurred while fetching the assigned iteration of the selected issue.
`Settings.mattermost` is set but never reset in some specs
In https://gitlab.com/gitlab-org/gitlab-ce/blob/ad831ace7ed8d2ed999b15f8350aaa51f0490124/spec/services/groups/create_service_spec.rb#L47 and features/projects/services/mattermost_slash_command_spec.rb, Settings.mattermost['enabled']
is set but never reset to its original value.
This leads to other seemingly unrelated specs failing, e.g. https://gitlab.com/gitlab-org/gitlab-ce/blob/ad831ace7ed8d2ed999b15f8350aaa51f0490124/spec/features/groups_spec.rb#L18-24 (this started to fail since Knapsack is doing its job again and specs are run in a different order now).