memcapable expects NOT_STORED to be returned for append of nonexisting items
memcapable expects NOT_STORED to be returned for append of nonexisting items

Change-Id: Id5f73220a0e56edf522a9d56552d4c0b5b3f5415
Reviewed-on: https://review.northscale.com:8443/1323
Reviewed-by: Eric Lambert <7ef4e71cebb32cb5e304f9d7d27d812f8d7da939@gmail.com>
Reviewed-by: Matt Ingenthron <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@northscale.com>
Tested-by: Matt Ingenthron <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@northscale.com>

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