Bug 31593: Remove Test::DBIx::Class from Context.t

Bug 31593: Remove Test::DBIx::Class from Context.t

No need to keep it.
Fixing a test description too.

Test plan:
Run t/db_dependent/Context.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 499562f0b80ca705e94581ccef0eebadce1ed6f9)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 3088c2f56a8f21a696cab4d80dde20db8fa164b7)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>