Unlike g_test_dbus_down(), this won't verify the gio.DBusConnection
singleton returned by Bus.get or Bus.getSync is destroyed. Unit
tests wanting to verify behaviour after the session bus has been stopped
can use this function but should still call g_test_dbus_down() when done.
Stop the session bus started by g_test_dbus_up().
Unlike g_test_dbus_down(), this won't verify the gio.DBusConnection singleton returned by Bus.get or Bus.getSync is destroyed. Unit tests wanting to verify behaviour after the session bus has been stopped can use this function but should still call g_test_dbus_down() when done.