CBQE-0: fix xdcr test test_verify_mb8825

Change-Id: Ia455226736a24ea898ea658e9d3937a993ad5847
Reviewed-on: http://review.couchbase.org/37495
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>