CANNES, France - Ethics and civility are not synonymous with honor but it’s generally understood, by most, that if you adhere to an ethical and civil conduct in life, honor will naturally flow from it. The idea of honor endures more or less overtly in Iranian society, and Asghar Farhadi’s new film “A Hero” thrives on it as leitmotif. The honor of one man, a painter calligrapher, crushed by debt after a business venture goes south. The honor of those