Bug 12462: Fix some POD errors

Bug 12462: Fix some POD errors

Bug 12041 made xt/author/podcorrectness.t consider files in the 'Koha' namespace.
Some of them where failing. This patch fixes some of those POD problems.

Best regards
To+

Test:
1) run prove xt/author/podcorrectness.t
it fails
2) apply patch
3) run again, now it's ok

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Before patch test fails. After it, it pass
No koha-qa errors

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>