New Delhi, Feb. 20 -- Before 2017, the concept of using Scotch whisky to make cocktails was virtually unheard of in India. Many traditional whisky drinkers, the world over not just in India, still consider it blasphemy to drink their Scotch in any forms other than neat or on the rocks. But Diageo Plc's iconic Johnnie Walker brand has received a significant fillip in the country after it launched a cocktail called Johnnie Ginger about two years ago, the British distiller's Indian arm said....