Bug 12194: add more tests for pdf creation

Bug 12194: add more tests for pdf creation

When run with KEEP_PDF enviroment variable it will keep
test.pdf for manual inspection. This can be used to verify
that ttf font configuration is complete like:

KEEP_PDF=1 KOHA_CONF=/etc/koha/sites/srvgit/koha-conf.xml prove t/Creators.t

sample of utf-8 text, font name and type will be on bottom of second page

Followed test plan, works as expected. (See comment#11)
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>