KNL-1051 Improved the SCS unit tests

git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@122212 66ffb92e-73f9-0310-93c1-f5514f145a0a
KNL-1051 Improved the SCS unit tests (so they are correct)

git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@122214 66ffb92e-73f9-0310-93c1-f5514f145a0a
KNL-1051 Improved the SCS documentation so it is correct

git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@122219 66ffb92e-73f9-0310-93c1-f5514f145a0a