MB-100: max_verify in py-newrebalance.conf

Change-Id: Id1c85c5725436539fa30207978f83375bc514a70
Reviewed-on: http://review.couchbase.org/24465
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>