MB-100: decr max_verify in py-newrebalance.conf

Change-Id: I02b54f9c8250197f613112d537751d3655727224
Reviewed-on: http://review.couchbase.org/24739
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>