Upgrade Sidekiq to 4.1.2
Fixes a memory leak: https://github.com/mperham/sidekiq/commit/a2bdb875fe495bc28b1bee80120e4a5641ca0731
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fixes a memory leak: https://github.com/mperham/sidekiq/commit/a2bdb875fe495bc28b1bee80120e4a5641ca0731