Add time synchronization enabled/disabled stat to vbucket stats
Add time synchronization enabled/disabled stat to vbucket stats

Change-Id: I800e4515e13e9ded35f72c7bb2082f5f5fe894de
Reviewed-on: http://review.couchbase.org/45413
Tested-by: Sriram Ganesan <fde85c3124eed34938bb85159f430bf7e5b650f6@couchbase.com>
Reviewed-by: abhinav dangeti <d73ef2279de6577f7bf081737ee47554bbb7dc82@couchbase.com>

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