Bug 12299: Translate marc21_relatorterms.sql into Italian

Bug 12299: Translate marc21_relatorterms.sql into Italian

To test:
- Apply this patch.
- Reset your DB (DROP DATABASE, CREATE DATABASE -- whatever method you
  prefer)
- Install it-IT templates on command line
- Run the webinstaller using it-IT
- Follow the steps and choose all under 'opzionali'
=> SUCCESS: no errors
=> Sign this
=> Extra: see the authorised value 'RELTERMS' and check if you like the
   translation

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Tested loading file.
Two errors fixed:
a) duplicate line ... ('RELTERMS','con', 'Conservatore')
b) missing semicolon ...  ('RELTERMS','voc','Cantante')

With that file loads Ok
No koha-qa errors

Ooops, forget the fix. Resubmited

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Adds an optional SQL file to the Italian installer - works as expected.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Removed BOM from file.