Update stats cmd for timings.
Update stats cmd for timings.

Change-Id: I54d4bc8f3eef0344ffaac56d7b166c38f3bdfd00
Reviewed-on: http://review.northscale.com/3007
Reviewed-by: Chiyoung Seo <8b279095f11c26cc21045fda5a3e51debb005aa9@gmail.com>
Tested-by: Chiyoung Seo <8b279095f11c26cc21045fda5a3e51debb005aa9@gmail.com>

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