(Additional reporting by Adrian Croft, Jeff Mason and Steve Holland; Editing by Kevin Liffey and Paul Taylor) (Reuters) - U.S. President Barack Obama told the European Union on Wednesday it cannot rely on the United States alone to reduce its dependency on Russian energy, as relations with Moscow chill over its seizure of Crimea from Ukraine. Speaking on a visit to Brussels to discuss trade relations and the Ukraine crisis, Obama said concluding a new transatlantic trade pact, now under negotiation, would make it easier for Washington to license more gas exports. :snip: During a 65-minute lunch, European Council President...