Madikeri:  Even as the suicide of Coffee Czar V.G. Siddhartha at Nethravathi River in Mangaluru is still fresh in memory, another well-to-do coffee businessman from South Kodagu shot himself with his licenced revolver last night. He took the extreme step at his office, sitting on his chair.  The coffee businessman is 44-year-old Achchiyanda Sunil, a…