@Deactivate
    public void deactivate() {
        eventDispatcher.removeSink(PiPipeconfEvent.class);
        executor.shutdown();
        driverAdminService.removeListener(driverListener);
        pipeconfs.clear();
        missingMergedDrivers.clear();
        cfgService = null;
        driverAdminService = null;
        log.info("Stopped");
    }
@Test
    public void deactivate() {
        mgr.deactivate();
        assertNull("Incorrect driver admin service", mgr.driverAdminService);
        assertNull("Incorrect driverAdminService service", mgr.driverAdminService);
        assertNull("Incorrect configuration service", mgr.cfgService);
    }