Serialize factory calls to the collector
Each entry process does at least one condor_status and one condor_advertise.
But the collector is only one!
So having O(100) condor_status and/or condor_advertise issued at the same time,
does not speed up the system, since the collector will answer them one at a time.
Worse, it actually slows it down considerably, as significant system resources are used in the process.
I thus propose to serialise access to the collector in the factory code.