Bug 17809: Correct authorised values for fr-FR

Bug 17809: Correct authorised values for fr-FR

This corrects:
CC -- duplicate, but name not full.
GQ -- duplicate, but only one name correct.
PK -- Poland was mislabelled.

This removes and edits duplicates and corrects PK to PL.

Signed-off-by: Luke Honiss <luke.honiss@gmail.com>
Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>