NBC is planning the retirement of Jay Leno and filling the talk show seats with hosts. Conan O’Brien is taking over the “Tonight Show” reigns and Jimmy Fallon is said to be filling the void left by Conan on “Late Night.” “The word is out among the NBC brass: As rumored and bounced around for some time, Jimmy Fallon is set to take Conan O’Brien’s job as host of “Late Night” ...