public void enable() {
        enabled = true;
        superModelManager.markAsComplete();
        updateHandler();
    }
Signals that config has been activated for an {@link com.yahoo.vespa.config.server.application.Application}
belonging to a tenant.

@param applicationVersions The activated set of {@link com.yahoo.vespa.config.server.application.Application}s.
configserver/src/main/java/com/yahoo/vespa/config/server/SuperModelRequestHandler.java