fixes #339 made notification finder scan less aggressively

If queue size is 4, should we wait until it gets to 2.  I think this should stop if the queue size gets below 10 (or whatever you think makes sense)...
```java
while(hwf.getWorkerQueue().size() > 10) && (hwf.getWorkerQueue().size() > qSize/2) && !stopped.get())
```