KNL-1257 removed workaround



git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@309885 66ffb92e-73f9-0310-93c1-f5514f145a0a
KNL-1250 fix from Paul at Western U to resolve an issue where many unnecessary inserts were happening when refreshAuthzGroup was being called. The bug was originally introduced in KNL-800. This patch contains a fair bit of refactoring and has been discussed quite a bit on the Core Team call and core-team list.


git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@309889 66ffb92e-73f9-0310-93c1-f5514f145a0a