By Vidya Ranganathan and Alun John SINGAPORE/LONDON (Reuters) -Global currencies steadied on Monday as looming central bank decisions in Japan and Europe and vacillating market expectations for U.S. Federal Reserve rate cuts forced a pause in the dollar’s data-spurred rally this year. Japan’s yen was one of the bigger movers, heading away from Friday’s 148.80 per dollar, its weakest in a month, to as firm as 147.74, as the Bank of Japan started its two-day policy meeting. Wagers for an exit from negative rates at this meeting have been wound down following the New Year’s Day earthquake on Japa…