public NodeFailer createFailer() {
        return new NodeFailer(deployer, nodeRepository, downtimeLimitOneHour,
                              Duration.ofMinutes(5), NodeFailer.ThrottlePolicy.hosted, metric);
    }
Create hostCount hosts, one app with containerCount containers, and one app with contentCount content nodes.
node-repository/src/test/java/com/yahoo/vespa/hosted/provision/maintenance/NodeFailTester.java