Stop testing Ruby 2.1. We now have gems that require >= 2.2.0
From https://gitlab.com/gitlab-org/gitlab-ce/builds/4148858:
rubocop-rspec-1.7.0 requires ruby version >= 2.2.0, which is incompatible with
the current version, ruby 2.1.10p492Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
From https://gitlab.com/gitlab-org/gitlab-ce/builds/4148858:
rubocop-rspec-1.7.0 requires ruby version >= 2.2.0, which is incompatible with
the current version, ruby 2.1.10p492