Workaround RHBZ#1618928 (hit space till errors go away)
    
    Per Neal Gompa boot will proceed if we just page through the
    error(?) messages displayed when #1618928 happens, so let's do
    that to let the tests get further and see what else is broken.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>