By Daniel Leussink TOKYO, May 15 (Reuters) - The dollar held steady while the Australian dollar hovered near a more than four-month low on Wednesday, as traders awaited European and U.S. data for clues on whether the worst is over for the global economy. The foreign exchange market showed little reaction to worse-than-expected growth in Chinese industrial output and retail sales for April that underlined the need for Beijing to roll out more stimulus measures to support the world's second-largest economy.