* Africa's rapid growth has left many behind
* After Mandela, whites still controlled economy
* Many leaders cling to power, ignoring Mandela's example
By Edmund Blair and Drazen Jorgic
NAIROBI, Dec 6 (Reuters) - Mourning the loss of a man who bridged South Africa's racial divide, many Africans hope their leaders today will be inspired by Nelson Mandela to heal another rift widening ...