Gracefully recover from Redis connection failures in Sidekiq initializer
Precompiling assets and other Rake tasks would fail if Redis were not available in certain cases.
- Closes gitlab-org/gitlab-ce#25143
- Closes omnibus-gitlab#1743 (closed)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Precompiling assets and other Rake tasks would fail if Redis were not available in certain cases.