Consider removing Mattermost E2E QA Tests
Why?
- Mattermost really isn't managed by a single team (cross-stage)
- Getting some weird behavior from the Mattermost tests in job(s) - https://gitlab.com/gitlab-org/gitlab-qa/-/jobs/184991697
- Reduce the testing scope. In this test we are testing "Mattermost". we should be testing "GitLab"
- Mattermost has what appears to be pretty extensive coverage in GL Specs **(62 occurences of the text "[Mm]atter[Mm]ost" in the spec folder)
I recommend that we remove the following tests from our E2E test suite:
7_configure/mattermost/create_group_with_mattermost_team_spec.rb
1_manage/login/log_into_mattermost_via_gitlab_spec.rb
WDYT @meks , @gl-quality ?