this.extensionRegistryTracker.open();
this.discoveryTracker = new ServiceTracker(ctxt, IDiscoveryAdvertiser.class.getName(), null);
this.discoveryTracker.open();
serverManager = new ServerManager();
// Register generic server container group factory service
this.gscgFactory = new GenericServerContainerGroupFactory();
this.gscgRegistration = this.context.registerService(IGenericServerContainerGroupFactory.class.getName(), gscgFactory, null);
}