Bug 32926: Fix selenium tests

Bug 32926: Fix selenium tests

We should not rely on existing data, and we should remove data at the end.

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit f16baef8794870d12272cf173e5396a86aa7673c)
Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>
(cherry picked from commit 99f7e5efb35e6f6715af0a7812f937e637e543a1)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 22e6d245980be79a6544d8e50e84bc388418ff29)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>