Bug 23310: Reduce noise in Koha::Biblio

Bug 23310: Reduce noise in Koha::Biblio

The use of uninitialized value flooding plack-error
can get rather distracting and annoying.
By using "// q{}" after each of the subfield() calls
this eliminates the problem

TEST PLAN
---------
vertical break where you stop your cut-and-paste.
This test should be repeatable with cut-and-paste
easily.

restart_all
kshell

prove t/db_dependent/Koha/Biblio.t
-- may strangely be quiet.

prove t/db_dependent/Koha/Biblios.t t/db_dependent/Koha/Biblio.t
-- should be noisy.

prove t/db_dependent/Koha/Biblio.t
-- will always be noisy now.

exit
git bz apply 23310

restart_all
kshell

prove t/db_dependent/Koha/Biblio.t
-- will be quiet.

prove t/db_dependent/Koha/Biblios.t t/db_dependent/Koha/Biblio.t
-- will be quiet.

prove t/db_dependent/Koha/Biblio.t
-- will be quiet.

qa -v 2 -c 1

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>