spec: adjust test to work around timezones
spec: adjust test to work around timezones

Signed-off-by: Kill Bill core team <1a73af9e7ae00182733b2292511b814be66f065f@killbill.io>

SquareMike/killbill-cybersource-plugin,killbill/killbill-cybersource-plugin,SquareMike/killbill-cybersource-plugin,SquareMike/killbill-cybersource-plugin,killbill/killbill-cybersource-plugin,killbill/killbill-cybersource-plugin