CBQE-0: added test for xdcr upgrade from 3.0.0 - 3.0.1

Change-Id: I4a9f8e800b3ba44d6d8296a377efdba6c429830b
Reviewed-on: http://review.couchbase.org/42318
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>