Skip post-install actions for VNC client installs

...otherwise the VNC client tests fail on aarch64 because we try
to apply the 'console=tty0' workaround for #1661288. Fortunately
we don't really need that for the VNC install test to work, so
let's just skip it. We can make this more sophisticated later if
it turns out to be necessary.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

tests/_do_install_and_reboot.pm

@@ -139,6 +139,10 @@ sub run {
     # for lives is unreliable. And if we're already doing something
     # else at a console, we may as well reboot from there too
     push (@actions, 'reboot') if (!get_var("MEMCHECK") && (get_var("LIVE") || @actions));
+    # our approach for taking all these actions doesn't work on VNC
+    # installs, fortunately we don't need any of them in that case
+    # yet, so for now let's just flush the list here if we're VNC
+    @actions = () if (get_var("VNC_CLIENT"));
     # If we have no actions, let's just go ahead and reboot now,
     # unless this is memcheck
     unless (@actions) {