vbucket state to string
vbucket state to string

Change-Id: I379a048692cd7178414425cfe08f22dd20aa9e2b
Reviewed-on: http://review.northscale.com:8080/185
Reviewed-by: Sean Lynch <9c3328a4a1f4f8f5c18b2d5b9057163c49b93ff3@literati.org>
Tested-by: Sean Lynch <9c3328a4a1f4f8f5c18b2d5b9057163c49b93ff3@literati.org>

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