Implement monitoring outputs for the online dqm input sources.

Also:
Separate edm and dqm namespaces, and make them explicit where needed.
A new version of the fff deletion daemon.

Now includes a startup script.
Monitoring updates for the next GR.
Introduce a work-around for a mysterious InputSource bug (DQMProtobufReader).

Also implement a way to load json files which use unexpected 'data'
field format in DQMProtobufReader.
Implement ".debug" mode in DQMMonitoringService.

This mode produces filenames which include the timestamp
and therefore can be replayed without relaunching the processing.
Merged with Laura's changes and enabled monitoring.
Merge pull request #4938 from dmitrijus/deletermonitoring

Deletion script and the monitoring updates