Make omniauth-kerberos dependency optional (add group 'kerberos')
Most people doesn’t use Kerberos for authentication, so we should not require to install omniauth-kerberos and hence libkrb5-dev.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Most people doesn’t use Kerberos for authentication, so we should not require to install omniauth-kerberos and hence libkrb5-dev.