Test that ipapwpolicy objectclass is added on upgrade
    
    Use ldapmodify to remove the objectclass from the default
    global policy then run ipa-server-upgrade to confirm
    that it is properly added.
    
    https://pagure.io/freeipa/issue/8555
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>