Team USA doesn’t plan on taking the easy path to defending its Olympic gold medal. In advance of the 2012 Olympics in London, the United States has lined up five exhibition games, including showdowns with nemeses Spain and Argentina. The U.S. also will play Brazil, the Dominican Republic and host Britain in the lead-up to the Olympics, USA Basketball announced Friday. “We have again scheduled an extremely challenging lineup of exhibition opponents for our USA Men’s National Team,” USA Basketball chairman Jerry Colangelo