MB-7969: add asymmetric resource config (2->1)

Change-Id: If49eed36a0b9c96b336887fb078b188cccd96273
Reviewed-on: http://review.couchbase.org/25391
Reviewed-by: Pavel Paulau <pavel.paulau@gmail.com>
Tested-by: Pavel Paulau <pavel.paulau@gmail.com>