Pulled out notification RPC as we're going to integrate with normal status RPC.
Pulled out notification RPC as we're going to integrate with normal status RPC.

Autoconverted from SVN (revision:2752)

artefactual/archivematica-history,artefactual/archivematica-history,artefactual/archivematica-history,artefactual/archivematica-history