GLOBAL MARKETS-ECB easing bets push euro to 3-month low

(Recasts with euro falling to 3-month low, updates prices, adds comments) * Euro sinks as weaker than forecast German data boosts ECB rate cut bets * Wall Street expected to see steady start * Little impact of ratings upgrades for Spain and Greece * Investors wary ahead of Ukraine vote, European result * Thai coup only mild distraction for Asia shares By Marc Jon