Fix mapping and defaulting of print-quality/cupsPrintQuality (Issue #5090)

Fix mapping and defaulting of print-quality/cupsPrintQuality (Issue #5090)

- cups/dest.c: Don't include empty default media or print-quality in dest
  options.
- cups/options.c: When setting cupsPrintQuality, clear print-quality and vise-
  versa.
- cups/testipp.c: Use current API to show attribute values.
- scheduler/ipp.c: Log request attributes, defaults.
- scheduler/job.c: Add/map print-quality/cupsPrintQuality, log mapped options.

Fixes: #5090