SAK-23299 print stacktrace as debug option

git-svn-id: https://source.sakaiproject.org/svn/jobscheduler/trunk@120892 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-23299 fix typo

git-svn-id: https://source.sakaiproject.org/svn/jobscheduler/trunk@120896 66ffb92e-73f9-0310-93c1-f5514f145a0a