message: setter for dynamic model
diff: @@ -105,6 +105,10 @@ class Agent : public Object {
  execution_model_ = execution_model_ptr;
  }
  + void SetDynamicModel(const DynamicModelPtr &dynamic_model_ptr) {
  + dynamic_model_ = dynamic_model_ptr;
  + }
  +
  void SetGoalDefinition(const GoalDefinitionPtr &goal_definition) {
  goal_definition_ = goal_definition;
  }
  