Update healthchecker for simple test (CBD-1191)

Change-Id: Ic1a9b665bf2db3a5b605c1b99785354cecf0f6ed
Reviewed-on: http://review.couchbase.org/33413
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>