MB-10303 Correctly check all the constraints with num_replicas=1.

Change-Id: I9141a819fd1d46e1d25b2f5888ea736c43f3cb1c
Reviewed-on: http://review.couchbase.org/34663
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>