MB-11437 do not set UserSupplied for local url

local url should alway be overwritten on master if we add second node
to cluster

Change-Id: Icb49fe1714e3c38c75eb3ecb0742ccc5e1dcb0c5
Reviewed-on: http://review.couchbase.org/38357
Tested-by: Artem Stemkovski <artem@couchbase.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>