CBQE-0: kept the increment offline upgrade tests prior to online upgrade

Change-Id: Ia8e6c3f15baf866b62ce6a89fea496808b377692
Reviewed-on: http://review.couchbase.org/40320
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>