Fix parallel universe schedd crash #4163

Problem was a re-entrant walking of the job queue.  Only triggered
when periodic expression tried to remove a parallel universe job.
add -quick option to condor_who for use in test suite #4147
-quick modifies -daemons so the result is quick (and possibly stale).
===VersionHistory:None=== not a user visible option.
Merge branch 'V8_0-branch'