KNL-1063 attempting to fix up oracle related stupidness caused by hibernate being stupid - http://stackoverflow.com/questions/3719905/why-has-hibernate-switched-to-use-long-over-clob

git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@307777 66ffb92e-73f9-0310-93c1-f5514f145a0a