Bug 6989 Patron categories not properly displayed if not pure ASCII

Bug 6989 Patron categories not properly displayed if not pure ASCII

C4::Category module returns badly encoded patron categories when they are
containing non pure-ASCII characters.

To reproduce this bug:

  - Go in Administration > Patron Categories
  - Add a new category. Give it this code for example:
    Café
  - Click on Patrons link on top menu
  - Click on New button

    => You get 'Café' displayed without accent

Signed-off-by: Piotr Wejman <ropuch@bagno.be>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
(cherry picked from commit d998166ea30e9d798c97d457afe39c748eed38ae)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>