Bug 3977: MARC21 321$b has wrong description

Bug 3977: MARC21 321$b has wrong description

Fixing descriptions in all frameworks for consistency.

Changed frameworks are:
- es-ES, default framework
- fr-FR, default and simple frameworks
- nb-NO, default and simple frameworks
- pl-PL, default and simple frameworks

To test:
- verify changes by reading them
- or verify by running the web installers of those languages
  and checking the description appears correctly
- or verify by loading the sql files manually and check
  they still load correctly

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>