Johann Rupert and family have emerged as the richest man in Africa, dislodging Nigeria’s Alhaji Aliko Dangote as the continent’s wealthiest man in a list released by Forbes magazine. In the billionaire rankings released by the financial magazine, Nigerian billionaires Alhaji Rabiu Abdulsamad and Otunba Mike Adenuga lost their spots. The Forbes Daily billionaires ranking platform, which tracks daily changes …