public static SuspensionReasons isDown(ServiceInstance service) {
        return new SuspensionReasons().addReason(
                service.hostName(),
                service.descriptiveName() + " is down");
    }
Information worth logging when/if suspending a host.

@author hakon
orchestrator/src/main/java/com/yahoo/vespa/orchestrator/policy/SuspensionReasons.java