CBQE-0: minor changes in incremental_rebalance_out_with_ops

Change-Id: I263f951bc921675b6c802e6c461f2e1a395f35c6
Reviewed-on: http://review.couchbase.org/26849
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>