The White House released final plans Tuesday to streamline the federal bureaucracy by eliminating 500 regulatory requirements across two dozen federal agencies, an overhaul that could make it easier for travelers to obtain a visa and military contractors to get paid. Officials said the reforms, which came in response to President Obama’s order in January for agencies to eliminate red tape, could save up to $10 billion over five years. The cost savings are “a pretty big deal,” Cass Sunstein, administrator of the Office of Information and Regulatory Affairs, said on a morning conference call with reporters.