Fixed for methods with no callback specified for APM
Fixed for methods with no callback specified for APM

zhangyaoxing/node-mongodb-native,beni55/node-mongodb-native,HiLittleCat/node-mongodb-native,thenaughtychild/node-mongodb-native,capaj/node-mongodb-native,PeterWangPo/node-mongodb-native,mongodb/node-mongodb-native,jqk6/node-mongodb-native,mongodb/node-mongodb-native,agclever/node-mongodb-native,mongodb/node-mongodb-native,d-mon-/node-mongodb-native,flyingfisher/node-mongodb-native,mongodb/node-mongodb-native,pakokrew/node-mongodb-native