[SIGNED-OFF] Bug 22522: [19.11.x] Add support for current Mojolicious and related...

[SIGNED-OFF] Bug 22522: [19.11.x] Add support for current Mojolicious and related packages

This patch allows tests to succeed with the following versions:
JSON::Validator 3.18
Mojolicious 8.32
Mojolicious::Plugin::OpenAPI 2.21

Also Mojolicious::Plugin::OpenAPI version 1.17 and later 1.x versions now work.

Calling valid_input in under() would cause ' Use of uninitialized value $_[2] ' in more recent OpenAPI plugins, so that was changed too. As far as I can see this does not affect authorization.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Aleisha Amohia <aleishaamohia@hotmail.com>