BOSTON (Reuters) - Hedge fund managers are famous for betting against conventional wisdom, and this year many are doing just that by backing Democrat Barack Obama's White House bid and defying Wall Street's usual embrace of Republicans. New figures show the Illinois senator and presumptive Democratic presidential nominee has drawn $822,375 in campaign contributions from employees of hedge funds, compared to $348,300 for his Republican rival, Arizona Sen. John McCain. The figures, compiled for Reuters by the Center for Responsive Politics, a nonpartisan campaign finance research group, reflect mounting concern over the rising cost of health care and other domestic...