KNL-1130 fix for SCS is setting defaulted=true tp ConfigItems with empty default values



git-svn-id: https://source.sakaiproject.org/svn/kernel@130513 66ffb92e-73f9-0310-93c1-f5514f145a0a
KNL-1127 Remove legacy content cleaner for 2.10



git-svn-id: https://source.sakaiproject.org/svn/kernel@130519 66ffb92e-73f9-0310-93c1-f5514f145a0a