Morry Gash/APThe Dodgers could see right through Marco Estrada of Milwaukee today.At the risk of taking Clayton Kershaw for granted, let’s bypass his latest sterling effort — eight shutout innings in the Dodgers’ 5-1 victory over Milwaukee today — and make our periodic foray into a Bullpen Usage 101. Or maybe it should just be Bullpen Usage 1.Of course, you know the drill by now, the age-old vexation, the pure folly that is refusing to use your top relievers in a tie game in order to preserve them for a save opportunity that might never come. That’s what happened Tuesday, when the Dodgers used the 2011 version of Hong-Chih Kuo and the 21st-century version of Mike MacDougal in a 1-1 ballgame in the bottom of the ninth rather than the Javy Guerra and his scorele