IT'S WAR! Two Wisconsin men are doing battle over polkas and a woman. If it sounds like it has all the ingredients of a daytime soap opera you'd be correct. Polka star Ray Rubenzer has now won the court battle involving his ex-wife and her new toy boy, 82. He filed a copyright infringememnt lawsuit in June over his beloved classic, "Yodelin' Boy Polka." For years he performed it with his wife Lois...she began performing it with her new husband David Melgaard under the title "C'mon and Sing." But they were fooling anyone as true aficionados 