CBQE 0 - Comment _all_docs test for 3.0

Change-Id: I39de4ace52deab09f666c8a2d7e7bc2d6806c35b
Reviewed-on: http://review.couchbase.org/35138
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Meenakshi Goel <meenakshi.goel@globallogic.com>
Tested-by: Meenakshi Goel <meenakshi.goel@globallogic.com>