private void markCurrentClusterStateAsConverged(DatabaseHandler database, DatabaseHandler.DatabaseContext dbContext, FleetController fleetController) {
        context.log(log, Level.FINE, "All distributors have newest clusterstate, updating start timestamps in zookeeper and clearing them from cluster state");
        lastClusterStateVersionConverged = clusterStateBundle.getVersion();
        lastClusterStateBundleConverged = clusterStateBundle;
        fleetController.handleAllDistributorsInSync(database, dbContext);
    }
Checks if all distributor nodes have ACKed (and activated) the most recent cluster state.
Iff this is the case, triggers handleAllDistributorsInSync() on the provided FleetController
object and updates the broadcaster's last known in-sync cluster state version.
clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/SystemStateBroadcaster.java