CBQE-0: comment com-->ent upgrade tests for old releases

Change-Id: I7d97c3a960930f02135cb4e6fa65af0897e8b06a
Reviewed-on: http://review.couchbase.org/26823
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>