By Stella Qiu SYDNEY, Oct 19 (Reuters) - Asian shares were mixed on Wednesday, with investors cautious on China amid the ongoing Party Congress, while European markets are set to extend the optimism on earnings ahead of British inflation readings. Better-than-expected quarterly results from Goldman Sachs Group Inc GS.N, Johnson & Johnson JNJ.N and Lockheed Martin LMT.N helped U.S. stocks rally. Netflix Inc NFLX.O reversed customer losses that had hammered its stock this year and projected more growth ahead, sending its shares 14% higher in after-hours trading.