REUTERS/Carlos BarriaBanks and insurance companies trying to keep the public in the dark about their business dealings with Donald Trump ran into a ray of legal sunshine on Tuesday, after a judge ruled that he wouldn’t seal records in the run-up to the New York Attorney General’s upcoming trial against the real estate mogul.A handful of firms associated with Trump made a last-ditch effort to hide documents that detailed the way they unwittingly became part of the Trump Organization’s alleged sch