Initialize cas for items that doesn't exist in the cache
Initialize cas for items that doesn't exist in the cache

Change-Id: I8275d22e5177a90d2c3e41d450b2e29f50fc4daa
Reviewed-on: https://review.northscale.com:8443/1322
Reviewed-by: Eric Lambert <7ef4e71cebb32cb5e304f9d7d27d812f8d7da939@gmail.com>
Reviewed-by: Matt Ingenthron <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@northscale.com>
Tested-by: Matt Ingenthron <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@northscale.com>

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