By Karen Freifeld and Luc Cohen NEW YORK (Reuters) -Former President Donald Trump’s real estate company cheated tax authorities for 15 years, a prosecutor said on Monday in her opening statement in the Trump Organization’s criminal tax fraud trial, while defense lawyers countered that the company’s longtime chief financial officer had acted for his own benefit. The company paid certain executives – including former CFO Allen Weisselberg – in perks such as rent and cars without reporting those benefits to tax authorities, and falsely reported bonuses as non-employee compensation, said prosecuto…