- Add macro to enable/disable this change.

   - See ticket #1405

Also renamed 'numReorderPics' variables to 'maxNumReorderPics'

- fixes other style issues as well

- new pattern: create a class to collect all parameters  related to this SEI
- existing code can be refactored to use the same pattern for grouping to avoid endless assignments

Note: fixes executable flags for some unrelated config files