Driver alg node.cpp: update config variable with new_cfg

driver_templates/template_driver_node.cpp

@@ -69,6 +69,7 @@ void TemplateNode::node_config_update(Config& new_cfg, uint32_t level)
   this->driver_.lock();
   if(new_cfg.rate!=this->getRate())
     this->setRate(new_cfg.rate);
+  this->config_=new_cfg;
   this->driver_.unlock();
 }