Bug 24879: (follow-up) Fix test suite

Bug 24879: (follow-up) Fix test suite

Running cataloguing pluings (in cataloguing/value_builder) now requires
authentification.

This patch adds in failing unit tests a mock of C4::Auth::check_cookie_auth

Test with:
prove t/db_dependent/FrameworkPlugin.t t/db_dependent/Koha/UI/Form/Builder/Biblio.t t/db_dependent/Koha/UI/Form/Builder/Item.t t/db_dependent/Serials.t

(cherry picked from commit f8a23b8ef46aea60eda9211a3e89af85d650ac26)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
suite

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>