SLING-3624 - test the annotated health check sample

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1614760 13f79535-47bb-0310-9956-ffa450edef68
SLING-3744 - test async health check with cron expression

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1614761 13f79535-47bb-0310-9956-ffa450edef68