private List<Autoscaling> suggestionsOf(ApplicationId app, ClusterSpec cluster, ProvisioningTester tester) {
        return tester.nodeRepository().applications().get(app).get().cluster(cluster.id()).get().suggestions();
    }
Tests the scaling suggestions maintainer integration.
The specific suggestions are not tested here.

@author bratseth
node-repository/src/test/java/com/yahoo/vespa/hosted/provision/maintenance/ScalingSuggestionsMaintainerTest.java