Back in Cannes with Kieślowski-inspired "Parallel Tales," starring Isabelle Huppert and Vincent Cassel, the two-time Oscar winner ("A Separation," "The Salesman") explains his unwillingness to work in Iran. Asghar Farhadi returns to the Cannes competition for the fifth time with his 10th feature, “Parallel Tales,” loosely inspired by the late Polish filmmaker Krzysztof Kieślowski’s 1988 “Dekalog: Six,” covering the commandment “Thou shalt not commit adultery.” Five years ago, Farhadi, who lives