@Override
    protected double maintain() {
        infraDeployer.activateAllSupportedInfraApplications(false);
        return 1.0;
    }
Periodically deploys infrastructure applications.
TODO: Merge this with {@link PeriodicApplicationMaintainer}

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