avoid dedupe map during single-key gets
avoid dedupe map during single-key gets

Change-Id: I84f6ca20ae0b52bce59e543d7de405f2e00923f0
Reviewed-on: http://review.northscale.com:8080/695
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Reviewed-by: Eric Lambert <7ef4e71cebb32cb5e304f9d7d27d812f8d7da939@gmail.com>
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

steveyen/moxi,membase/moxi,zbase/moxi,membase/moxi,membase/moxi,couchbase/moxi,zbase/moxi,steveyen/moxi,membase/moxi,zbase/moxi,steveyen/moxi,couchbase/moxi,couchbase/moxi,zbase/moxi,couchbase/moxi,membase/moxi,steveyen/moxi,steveyen/moxi,couchbase/moxi,membase/moxi,couchbase/moxi,zbase/moxi