BRUSSELS/BERLIN (Reuters) - Germany signalled on Wednesday it was ready to back plans for the European Central Bank to be made the chief supervisor of banks, raising the prospect of a breakthrough on the European Union's most ambitious financial reform. Finance Minister Wolfgang Schaeuble told the German cabinet he was "optimistic" about a deal ahead of a meeting of EU finance ministers in Brussels on Wednesday, a German official said, speaking on condition of anonymity. "We hope for major progress and perhaps a breakthrough (in the talks)," he said. ...