CBQE:0 Fix testrunner to accept new REST responses from goxdcr

Change-Id: I0a573196384ceb8afa843fc29fb154728d215681
Reviewed-on: http://review.couchbase.org/44408
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Aruna Piravi <aruna@couchbase.com>
Tested-by: Aruna Piravi <aruna@couchbase.com>