Add RuboCop
This does not yet add RuboCop to CI because we still have some things to fix.
Closes https://gitlab.com/gitlab-org/release-tools/issues/30
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This does not yet add RuboCop to CI because we still have some things to fix.
Closes https://gitlab.com/gitlab-org/release-tools/issues/30