Bug 33727: Groundwork for Calendar.t

Bug 33727: Groundwork for Calendar.t

Update test while removing need for Test::DBIx::Class.

Test plan:
Run t/Calendar.t

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 6e736a5d5f342325651944772b74c5ace1b8814f)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit d77d59fcaa5cb9fbbf92777282101a64ef285df7)
Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>