Hollywood -- The executive producer and two stars of the new “Planet of the Apes” series are alumni of the University of Michigan.   Still true to the Maize and Blue of the Wolverines are the executive producer, Herbert Hirschman; Booth Colman, who portrays the presiding orangutan, Zaius, and Mark Lenard, who plays Urko, the gorilla military leader in the action-drama in which apes rule the world.   Hirschman also received a Masters of Fine Arts degree from Yale University Drama School—and so did James Naughton, who portrays astronaut Pete Burke.