* European stocks finish slightly higher* Dow and S&P 500 hit record closing highs* ECB&aposs Draghi promises more easing* Dollar regains traction, oil remains under pressure(Adds U.S. market close)By Chuck MikolajczakNEW YORK, Nov 6 (Reuters) - The euro stumbled to a two-year low and European government bond yields dipped on Thursday after European Central Bank chief Mario Draghi reiterated plans