[CBD-1191] Update for healthchecker script.

Change-Id: I1596ae9644f28a4a5ae2419e27a2c6a504d73070
Reviewed-on: http://review.couchbase.org/33528
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>