Bug 12621: Z39.50-targets - Record type is untranslatable

This patch makes displayed record types translatable

To test:
1) Go to Administration > Z39.50 servers
2) On column Record type the value is 'biblio' or 'authority'
3) Apply the patch
4) Reload the page, now record type must show 'Bibliographic'
or 'Authority'
5) Update translation file for a language, verify new entries
Strings are already on translation file, only a reference
for new entry on the file.

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Works nicely, no problems found.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>