By Ayenat Mersie and Clement Uwiringiyimana KIGALI (Reuters) – Commonwealth leaders settled in 2018 that Britain’s Prince Charles should succeed his mother Queen Elizabeth as head of the organisation, but as they gathered again in Rwanda some Caribbean member states were not at ease with the decision. The 54-nation club made up mostly of former British colonies presents itself as a partnership of equals and says the British monarch is not automatically its figurehead, yet so far the baton has passed from the queen’s father to herself to her son. “It’s a matter that I think should be under revi…