Reset the last persisted checkpoint id upon resetting a vbucket.
Reset the last persisted checkpoint id upon resetting a vbucket.

Change-Id: I4fae05a340fc1021f17bf72cc7981e47c362a7c8
Reviewed-on: http://review.membase.org/5952
Tested-by: Chiyoung Seo <8b279095f11c26cc21045fda5a3e51debb005aa9@gmail.com>
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

owendCB/ep-engine,abhinavdangeti/ep-engine,daverigby/ep-engine,zbase/ep-engine,couchbase/ep-engine,teligent-ru/ep-engine,daverigby/kv_engine,jimwwalker/ep-engine,daverigby/kv_engine,zbase/ep-engine,hisundar/ep-engine,teligent-ru/ep-engine,membase/ep-engine,teligent-ru/ep-engine,abhinavdangeti/ep-engine,couchbaselabs/ep-engine,abhinavdangeti/ep-engine,sriganes/ep-engine,couchbase/ep-engine,sriganes/ep-engine,sriganes/ep-engine,daverigby/ep-engine,daverigby/kv_engine,jimwwalker/ep-engine,hisundar/ep-engine,membase/ep-engine,membase/ep-engine,jimwwalker/ep-engine,owendCB/ep-engine,zbase/ep-engine,couchbaselabs/ep-engine,couchbaselabs/ep-engine,teligent-ru/ep-engine,daverigby/kv_engine,abhinavdangeti/ep-engine,zbase/ep-engine,couchbase/ep-engine,jimwwalker/ep-engine,zbase/ep-engine,hisundar/ep-engine,sriganes/ep-engine,couchbaselabs/ep-engine,daverigby/ep-engine,membase/ep-engine,hisundar/ep-engine,abhinavdangeti/ep-engine,couchbaselabs/ep-engine,daverigby/ep-engine,couchbase/ep-engine,owendCB/ep-engine,owendCB/ep-engine