KNL-1084 SAK-22169



git-svn-id: https://source.sakaiproject.org/svn/kernel@132323 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-25440 added -Dsakai.cluster.memcached=true and various cleanup

git-svn-id: https://source.sakaiproject.org/svn/kernel@132328 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-25440 classloader registry implemented, now onto kryo piece the fun part..

git-svn-id: https://source.sakaiproject.org/svn/kernel@132345 66ffb92e-73f9-0310-93c1-f5514f145a0a