Bug 14977: Remove C4::Dates from files t/db_dependent/*.t

Bug 14977: Remove C4::Dates from files t/db_dependent/*.t

This patch removes C4::Dates from following files:

-  t/db_dependent/Budgets.t
-  t/db_dependent/Holds.t
-  t/db_dependent/Koha_template_plugin_KohaDates.t
-  t/db_dependent/Log.t
-  t/db_dependent/NewsChannels.t

To test:
- First run all tests above
- Apply patch
- Then run tests again. The results should be the same.
  (Note: I get 2 fails with NewsChannels.t, they are the same with
   and without patch).

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
NewsChanell pass for me before patch, no after.
Followup follows :)
Rest of tests pass

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>