Tweak setup_tap_static and FreeIPA tests for resolved
    
    This does some of the things suggested by cheimes in
    https://bugzilla.redhat.com/show_bug.cgi?id=1880628#c24 . I'm
    not sure if all these changes are safe yet.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>