@Override
    public void applicationRemoved(ApplicationId applicationId) {
        superModelRequestHandler.removeApplication(applicationId);
        configActivated(applicationId);
        configActivated(ApplicationId.global());
    }
Checks all delayed responses for config changes and waits until all has been answered.
This method should be called when config is activated in the server.
configserver/src/main/java/com/yahoo/vespa/config/server/rpc/RpcServer.java