MB-16055: keep readonly user settings when modifying quota
MB-16055: keep readonly user settings when modifying quota

Change-Id: If2c0d10d0a7e6888a97768d7e62b017fe3bdf4dc
Reviewed-on: http://review.couchbase.org/54829
Reviewed-by: Bin Cui <ed18693fff32c00e22495f4877a3b901bed09041@gmail.com>
Tested-by: Bin Cui <ed18693fff32c00e22495f4877a3b901bed09041@gmail.com>

couchbase/couchbase-cli,couchbase/couchbase-cli