CBQE-0: fix initial version check for pause xdcr in online_upgrade

Change-Id: Id6eddaf7da2f0a1f3b023a10b05c355cf96bd78b
Reviewed-on: http://review.couchbase.org/36983
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>