testbus-agent-kvm init script: do not call remove-host when stopping the service

Signed-off-by: Olaf Kirch <okir@suse.de>
Add ni_dbus_object_recv_property, which is the client side of Properties.Get()

Signed-off-by: Olaf Kirch <okir@suse.de>
client: rework the reboot handling to allow waiting for the rebooted machine to come back

Signed-off-by: Olaf Kirch <okir@suse.de>
server: when we reboot/shutdown a host, simulate a disconnect

Signed-off-by: Olaf Kirch <okir@suse.de>