CBQE-0: minor changes in incremental_rebalance_out_with_ops

Change-Id: Id103e8a03aa5fdf147bfd68cf09b7d6ebaad97e1
Reviewed-on: http://review.couchbase.org/26851
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>