Don't use backup AR connections for Sidekiq
This reduces the number of ActiveRecord connections by 2 for every Sidekiq process. See the commit message and https://gitlab.com/gitlab-org/gitlab-ce/issues/27713 for more information.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This reduces the number of ActiveRecord connections by 2 for every Sidekiq process. See the commit message and https://gitlab.com/gitlab-org/gitlab-ce/issues/27713 for more information.