Move factory monitoring aggregation into its own process
The monitoring aggregation in the factory is taking ~30s on the OSG factories:
[2012-06-28T01:07:29+00:00 28838] Aggregate monitoring data
[2012-06-28T01:07:56+00:00 28838] Sleep 60 secs
This starts to be a long time for a control process.
I thus propose we move this task to a separate, dedicated process.