Mattermost does not remember teamname display settings from gitlab.rb on update.
Summary
Every time gitlab omnibus updates, the setting on how to display teammate names in mattermost get lost.
Steps to reproduce
In /etc/gitlab/gitlab.rb set the value
mattermost['service_teammate_name_display'] = "full_name"
And run gitlab-ctl reconfigure.
What is the current bug behavior?
Mattermost does not obey to the setting from gitlab.rb and you manually have to change the setting in the mattermost system console after every update. After an update it simply shows usernames instead of full names.
What is the expected correct behavior?
Mattermost obeying to the setting from gitlab.rb and showing full names after an update.