GLOBAL MARKETS-Gathering rate hike hopes lift dollar, Treasury yields

(Adds Wall St turning higher, oil surrendering gains and late prices) * Dollar gains on Fed rate hike hopes, data * U.S. Treasury short-term yields rise * Wall St turns up in late trading * Dollar pushes commodities to near six-year lows By Michael Connor NEW YORK, July 30 (Reuters) - The dollar touched one-week highs and shorter-term U.S. Treasury yields rose on Thursday as accelerating U.S. gross domestic product data encouraged bets policymakers will start hiking U