CBQE-0: minor changes in py-newrebalance.conf

Change-Id: I5f0ccf12c0b98a0e0588e04d5761513b8df7343a
Reviewed-on: http://review.couchbase.org/32903
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>