Bug 25729: Prevent Charges/Fees.t to fail on slow server

Bug 25729: Prevent Charges/Fees.t to fail on slow server

We must use t::lib::Dates::compare to compare dates

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit fcd659b2d4cf62df48113567c59392e8dff9696f)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit ddfec0a706c2233ea60bbdb990b5368ceebc982f)

Signed-off-by: Aleisha Amohia <aleishaamohia@hotmail.com>