Add base filters to cover meta classes.
Clear context in SessionCache
Fix misc. failing session test
Removing JDK7-comma from object.vm
Make enable/disable of filters multi-filter safe

With the addition of multiple filters, disabling by name was
throwing a concurrency exception in the while-loop. This now
makes use of an internal map which can be modified in place.
Remove old, incomplete comment
Add parens around the clauses
Only use admin status not leader status
Clarify admin01 variable name
Merge pull request #1590 from joshmoore/rebased/develop/session-uuid-fixes

Session uuid fixes (rebased onto develop)