send repack/express completion messages to SM

When streamer files are completely repacked or express
processed we have to send a notification back to the
StorageManager via the P5->CERN transfer system.
enable periodic dqm harvesting for express
Merge pull request #4035 from hufnagel/expressperiodicdqm

enable periodic dqm harvesting for express
Merge pull request #4034 from hufnagel/notify-sm

send repack/express completion messages to SM