@Override
        public void registerPartitionStateChangeListener(StateModelListenerType listenerType,
            PartitionStateChangeListener partitionStateChangeListener) {
          listeners.put(listenerType, partitionStateChangeListener);
        }
Instantiate an instance of this factory.
@param partitionLayout the {@link PartitionLayout} to use.
ambry-clustermap/src/main/java/com/github/ambry/clustermap/StaticClusterAgentsFactory.java