private ClusterApiImpl makeCfg1ClusterApi(ServiceStatus cfg1ServiceStatus, ServiceStatus cfg2ServiceStatus)
            throws HostStateChangeDeniedException {
        return makeConfigClusterApi(ModelTestUtils.NUMBER_OF_CONFIG_SERVERS, cfg1ServiceStatus, cfg2ServiceStatus);
    }
Make a ClusterApiImpl for the cfg1 config server, with cfg3 missing from the cluster (not provisioned).
orchestrator/src/test/java/com/yahoo/vespa/orchestrator/model/ClusterApiImplTest.java