@Deactivate
    public void deactivate() {
        sessionMap.clear();
        snmpDeviceMap.clear();
        log.info("Stopped");
    }
@Test
    public void testDeactivate() {
        snmpController.deactivate();
        assertEquals("Device map should be clear", 0, snmpController.getDevices().size());
        assertEquals("Session map should be clear", 0, snmpController.sessionMap.size());
    }