CBQE-0: trivial fix in UI tests

Change-Id: Iaed477f870854f58623c76ab80447d45f514b3cc
Reviewed-on: http://review.couchbase.org/41609
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Meenakshi Goel <meenakshi.goel@globallogic.com>
Tested-by: Meenakshi Goel <meenakshi.goel@globallogic.com>