Replaced loop_rate_ direct access by setRate function

algorithm_templates/template_alg_node.cpp

@@ -4,7 +4,7 @@ TemplateNode::TemplateNode(void) :
   algorithm_base::IriBaseAlgorithm<TemplateAlg>()
 {
   //init class attributes if necessary
-  //this->loop_rate_ = 2;//in [Hz]
+  //this->setRate(10);//in [Hz]
 
   // [init publishers]