Callback method afterReload on IReloadListener is called after creating the outgoing batches and before the batches are acknowledged

The afterReload method of IReloadListener should be called after the reload is completed. Currently, this gets called after creating the outgoing batches. The significance of the after-reload would be more when the reload itself is complete.
Our production systems would rely on this callback to update their in-memory cache. Since this callback is before the completion of the reload, it would generate a false alarm.

This gives further push to a request made in the JIRA: http://jira.codehaus.org/browse/SYMMETRICDS-153. There is need of this listener on the client and after-reload callback should be only after the OK status of all the incoming batches.