Upgrade carrierwave from 0.10.0 to 0.11.2.
Hopefully in preparation of an 0.12.0 release.
Changelog: https://github.com/carrierwaveuploader/carrierwave/compare/v0.10.0...v0.11.2
cc: @rspeicher
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Hopefully in preparation of an 0.12.0 release.
Changelog: https://github.com/carrierwaveuploader/carrierwave/compare/v0.10.0...v0.11.2
cc: @rspeicher