Friday, January 31, 2003 Shvat 28, 5763 Israel Time: 21:05 (GMT+2) PM rebuffs rumors he will offer defense portfolio to Labor By Aluf Benn and Yossi Verter, Haaretz Correspondents, Haaretz Service and AgenciesPrime Minister Ariel Sharon said Friday afternoon that rumors he was going to offer Labor the defense portfolio as part of a deal to lure them into the coalition were false. According to Sharon, the issue is not open for discussion, since current defense minister Shaul Mofaz will continue at his post in the 16th Knesset. "Mofaz is a great defense minister... and will continue to be defense...