8168512: (tz) Support tzdata2016h Reviewed-by: martin, okutsu

8163162: The separation between system loggers and application loggers should take the extension loader in consideration. Summary: DefaultLoggerFinder.isSystem is changed to return 'true' for classes loaded from the platform loader and its ancestors. This means that classes loaded by the platform loader will get exactly the same kind of loggers than classes loaded by the boot (null) loader. Reviewed-by: rriggs, mchung