Work on ITest-2 Failures:
- I think the recent work for 1071330 which added caching and last-update
  logic around SystemSettings adversely affected the LDAP tests which
  where doing direct update of read-only system settings.  Adding a
  new inetrnal-only local SLSB for safely updating a read-only SystemSetting
  and refactoring test class to use it.
- Removed now-obsolete NamedQuery that supported the old test-class logic.