Fixes for Active Directory client tests
    
    abbra told me where I was going wrong with the 'expected' target
    of the getent command ("AD/" is not a magic string, it's just
    "(netbiosname)/", and our netbios name is "SAMDOM"...) so this
    fixes that too, trying to avoid hard-coding stuff.
    
    For the kickstart test, it seems like it's a timing issue. We
    added this 'install sssd-tools and enable debugging' step to try
    and debug it, and instead it fixed it. So...let's just stick
    with this, for now, because it's useful to have this debugging
    anyway. If the problem starts happening again, we can fiddle
    about with it more.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>