MB-100: revised hhdgm cases

Change-Id: I32a15b0ce8b9e18aad768f33b97ad2d486b7d741
Reviewed-on: http://review.couchbase.org/28139
Reviewed-by: Ronnie Sun <ronnie@couchbase.com>
Tested-by: Ronnie Sun <ronnie@couchbase.com>