@Override
    public Set<ApplicationInstanceReference> getAllApplicationInstanceReferences() {
        return apps.stream().map(a ->
                new ApplicationInstanceReference(a.tenantId(),a.applicationInstanceId())).collect(Collectors.toSet());
    }
A hardcoded set of applications with one storage cluster with two nodes each.

@author oyving
@author smorgrav
orchestrator/src/test/java/com/yahoo/vespa/orchestrator/DummyServiceMonitor.java