KNL-1162 removing the use of deprecated MemoryService methods

git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@307822 66ffb92e-73f9-0310-93c1-f5514f145a0a
KNL-1162 removing the HardCache and deprecated impl methods

git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@307824 66ffb92e-73f9-0310-93c1-f5514f145a0a