private void readied(InfrastructureApplication application) {
        if (application == null) return;
        if (readiedTypes.add(application)) executor.execute(() -> checkAndRedeploy(application));
    }
Performs on-demand redeployment of the {@link InfrastructureApplication}s, to minimise time between
host provisioning for a deployment completing, and deployment of its application containers succeeding.

@author jonmv
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/maintenance/InfraApplicationRedeployer.java