Improvements to hold aggregates regression test.
Improvements to hold aggregates regression test.

Better test: Have the job go on hold twice to make sure aggregates
increment as expected.  Also assert correctness of more hold attributes.
Faster test: Instead of starting all daemons in the personal condor,
just start a schedd.  Also use scheduler universe job - no need
to wait for matchmaking etc.
HTCONDOR-554

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor