Megastar Amitabh Bachchan, who is currently in Sydney shooting for The Great Gatsby, is to receive an honorary doctorate from the Queensland University of Technology in Brisbane on Thursday. “The Queensland University of Technology (QUT) honours me with a doctorate on the 20th of October in Brisbane…deep gratitude,” Amitabh posted on micro-blogging site Twitter. The 69-year-old will go to accept the honour post his shooting schedule. “Yes after I finish…