SAK-25867 allow archiving of all terms not just the current terms


git-svn-id: https://source.sakaiproject.org/svn/archive/trunk@315171 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-27804 set a sane default for the archive path and then check for existence of dir so we don't NPE


git-svn-id: https://source.sakaiproject.org/svn/archive/trunk@315172 66ffb92e-73f9-0310-93c1-f5514f145a0a