Don't update lastZxid on ping
Don't update lastZxid on ping

helight/helight_code,helight/helight_code,go-cloud/go-zookeeper,ngaut/go-zookeeper,helight/helight_code,helight/helight_code,helight/helight_code,cch123/go-zookeeper,rajivreddy/go-zookeeper,cyflhn/go-zookeeper,mondough/go-zookeeper,figoxu/go-zookeeper,helight/helight_code,theckman/go-zookeeper,helight/helight_code,helight/helight_code,aybabtme/go-zookeeper,lightpaw/go-zookeeper,tempbottle/go-zookeeper,dallasmarlow/go-zookeeper,ChannelMeter/go-zookeeper,zenoss/go-zookeeper,helight/helight_code,hailocab/go-zookeeper,kmiku7/go-zookeeper-annotated,mikeqian/go-zookeeper,wickman/go-zookeeper