CBQE-0: fix NegativeTests2 XDCR Test

Change-Id: Ib3a6902f894a113c274c44cca11ce507346ef70e
Reviewed-on: http://review.couchbase.org/41084
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>