code: def add_maxjobs_category(self,categoryName,maxJobsNum):
      
      self.__maxjobs_categories.append((str(categoryName),str(maxJobsNum)))
docs: Add a category to this DAG called categoryName with a maxjobs of maxJobsNum.
      @param node: Add (categoryName,maxJobsNum) tuple to CondorDAG.__maxjobs_categories.