HAVANA NOCTURNE: How the Mob Owned Cuba . . . And Then Lost It to the Revolution. T.J. English. Morrow. 416 pages. $27.95. Cuban writer Jose Lezama Lima's description of Havana -- ''an unnameable feast'' -- fits the city's last great era like the flawless suits from Pepe Sastre fit the best-dressed mobsters of the glittering casino years. ...