* Rouble down again after interest rates raised to 17 percent* Moscow stock markets plunge, drag U.S., Europe lower* China data shows factory sector contraction* Brent, U.S. crude well below $60 dollars a barrelBy Patrick GrahamLONDON, Dec 16 (Reuters) - Oil&aposs plunge below $60 and the failure of Russia&aposs huge emergency rate hike to stabilise the rouble jolted global markets on Tuesday, add