update terminate logic in csmachines for the case where a machine is never registerd with condor and then flagged for retire
update terminate logic in csmachines for the case where a machine is never registerd with condor and then flagged for retire

This change makes it so it checks the slot counts as soon as the retire flag is set instead of only after 1 retire has been issued.

hep-gc/cloudscheduler,hep-gc/cloudscheduler,hep-gc/cloudscheduler,hep-gc/cloudscheduler