By Samuel Indyk and Ankur Banerjee LONDON (Reuters) -The dollar was steady on Monday as investors took stock of U.S. economic data ahead of the Federal Reserve policy meeting this week, while escalating geopolitical tensions in the Middle East kept a lid on risk sentiment. The dollar index, which measures the U.S. currency against six rivals, was little changed at 103.53 on Monday and remained close to the six-week high of 103.82 it touched last week. The index is set for a 2% gain in January as traders temper expectations of early and deep U.S. interest rate cuts. The Fed in December surprise…