Toybuilder: couchstore

Change-Id: I7574d6b700742ff9a3886d7db9680b0ef7d62d1e
Reviewed-on: http://review.couchbase.org/38510
Reviewed-by: abhinav dangeti <abhinav@couchbase.com>
Tested-by: abhinav dangeti <abhinav@couchbase.com>