@Override
    public List<InfraApplicationApi> getSupportedInfraApplications() {
        return new ArrayList<>(supportedInfraApplications.values());
    }
Synchronously call {@link DuperModelListener#applicationActivated(ApplicationInfo) listener.applicationActivated()}
for each currently active application, and forward future changes.
service-monitor/src/main/java/com/yahoo/vespa/service/duper/DuperModelManager.java