fixed unmatched getTurn/putTurn, a bug introduced in code refactoring
fixed unmatched getTurn/putTurn, a bug introduced in code refactoring

columbia/xtern,columbia/xtern,hemingcui/xtern_with_paxos,columbia/xtern,hemingcui/xtern_with_paxos,columbia/xtern,columbia/xtern,hemingcui/xtern_with_paxos,hemingcui/xtern_with_paxos,columbia/xtern,hemingcui/xtern_with_paxos