- remove picture partitioning section from CTC file (so that they can be combined wit partitioning in any order)
- remove random access parameters from partitioning examples (combines well with AI or LD too)
- add examples for three slices with slice layout inference from subpictures and without
- try to make naming somewhat consistent

- don't access SPS/PPS references which are not set
- also fixes config files

JVET-O1143: motion and in-loop filter low-level operations adaptation when subpic boundaries are treated as pic boundaries