GLOBAL MARKETS-ECB QE question marks cool 3-day stocks rally

* ECB questions sour European shares after 3-day rally* Wall St rises 0.25 percent in opening deals* BOJ sticks with bond buying, ECB creeping closer to QE* Rouble bounces over 3 percent, oil above $60 a barrelBy Marc JonesLONDON, Dec 19 (Reuters) - A three-day rally in world share markets started to peter out on Friday as worries emerged that the European Central Bank&aposs money printing plans c