6218920: API bug - impossible to delete last MBeanServerForwarder on a connector
Reviewed-by: emcmanus

Reviewed-by: jfdenise, dfuchs

Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

6592586: RequiredModelMBean prints a WARNING message when calling getAttributes() for a non-existing attr
Summary: Switched traces to FINER - except when logging fails - in which cases the traces are logged to FINE
Reviewed-by: emcmanus

Summary: Fixed this and many other problems found by FindBugs.
Reviewed-by: dfuchs

Summary: Rewrite logging in RequiredModelMBean.addAttributeChangeNotificationListener
Reviewed-by: dfuchs