SCHLOSS ELMAU, Germany (Reuters) – Leaders of the Group of Seven wealthy nations mocked the macho image of their absent adversary Vladimir Putin on Sunday, at a meeting in Germany dominated by the Russian President’s invasion of Ukraine. As the besuited leaders sat down for their first meeting of the three-day G7 summit in the sweltering Bavarian Alps, British Prime Minister Boris Johnson asked if their jackets should come off – or if they should even disrobe further. “We all have to show that we’re tougher than Putin,” Johnson said, to laughter from some of his colleagues. “Bare-chested horse…