onDataChange notification is not returning any data to the getCreatedData and getModifiedData function calls. Data change notification does not seem to work.

After rebase on July 24th, the AsyncDataChangeEvent getCreatedData and getUpdatedData is no longer returning any data.
I have uploaded the sample code to git fetch https://git.opendaylight.org/gerrit/controller refs/changes/04/8804/2 && git checkout FETCH_HEAD

Essentially, I am creating a node extension, and then registering for data changes on the node extension.
dataChangeListenerRegistration = dataService.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION,InstanceIdentifier.builder(Nodes.class) .child(Node.class).augmentation(SampleTestNode.class).toInstance(),wakeupListener,DataChangeScope.SUBTREE);

and then in the onDataChanged method:
public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> change) {
Map<InstanceIdentifier<?>, DataObject> created = change.getCreatedData();
Map<InstanceIdentifier<?>, DataObject> modified = change.getUpdatedData();
if(created.isEmpty())

{ System.out.println("created map is empty"); }

if(modified.isEmpty())

{ System.out.println("modified map is empty"); }

}

In both the created/updated scenarios, the appropriate maps are empty.