@Activate
    protected void start(BundleContext bundleContext) throws Exception {
        ReferenceHolder.getInstance().setBundleContext(bundleContext);
        serviceRegistration = bundleContext.registerService(SiddhiComponentActivator.class.getName(),
                new SiddhiComponentActivator(), null);
    }
This is the activation method of SiddhiManagerService. This will be initilize the Siddhi Manager and register the
ManagerService.

@param bundleContext the bundle context instance of this bundle.
@throws Exception this will be thrown if an issue occurs while executing the activate method
modules/siddhi-core/src/main/java/io/siddhi/core/util/SiddhiManagerComponent.java