MB-11113 raise user_supplied flag during the user initiated node name change

... even if the node name has not actually changed.

Change-Id: Ifc809a48b9b9a70359b9432ee89ab5fa8284ebbf
Reviewed-on: http://review.couchbase.org/37487
Tested-by: Artem Stemkovski <artem@couchbase.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>