Modify toy-sriram.xml for memcached

Change-Id: Ic2792635c1e394338e37b5ba22b4be4a7dbd9f6d
Reviewed-on: http://review.couchbase.org/40540
Reviewed-by: Sriram Ganesan <sriram@couchbase.com>
Tested-by: Sriram Ganesan <sriram@couchbase.com>