UI tests for "Automember": check setting default user/host group
    
    https://pagure.io/freeipa/issue/7721
    
    Reviewed-By: Mohammad Rizwan Yusuf <myusuf@redhat.com>
    Reviewed-By: Petr Cech <pcech@redhat.com>
    Reviewed-By: Petr Vobornik <pvoborni@redhat.com>