BUG: const GetParameterByKey should have same behaviour as non-const version

Modules/Wrappers/ApplicationEngine/include/otbWrapperApplication.h

@@ -167,7 +167,7 @@ public:
   /* Get the internal application parameter specified
    *
    * WARNING: this method may disappear from the API */
-  const Parameter* GetParameterByKey(std::string parameter) const;
+  const Parameter* GetParameterByKey(std::string parameter, bool follow=true) const;
 
   /* Returns the description of a parameter */
   std::string GetParameterName(std::string paramKey);

Modules/Wrappers/ApplicationEngine/src/otbWrapperApplication.cxx

@@ -297,11 +297,11 @@ void Application::SetParameterUserValue(std::string paramKey, bool value)
   GetParameterByKey(paramKey)->SetUserValue(value);
 }
 
-const Parameter* Application::GetParameterByKey(std::string name) const
+const Parameter* Application::GetParameterByKey(std::string name, bool follow) const
 {
   // GetParameterList is non const...
   Application* _this = const_cast<Application*>(this);
-  return _this->GetParameterByKey(name);
+  return _this->GetParameterByKey(name,follow);
 }
 
 void Application::Init()