GLOBAL MARKETS-Stocks hit new highs; Portugal bond boosts sentiment

* MSCI share index at highest since 2008; DAX at record high * German data lifts euro, possible ECB action caps gains * Aussie dollar falls on RBA rate cut By Rodrigo Campos NEW YORK, May 7 (Reuters) - Major stock indexes in Germany and the United States hit all-time highs on Tuesday after data bolstered expectations that Germany has returned to growth, while a successful bond sale in Portugal indicated the country is on track to exit its bailout. The Reserve Bank of Austra