Test support for 25.5% VAT

Problem/Motivation

Drupal Commerce 2 supports decimals in VAT%.
Paytrail added support for that in June 20 https://www.google.com/amp/s/www.paytrail.com/kumppaniportaali/uutiset/a...

Proposed resolution

Test if new VAT works out of the box. If not create a follow-up issue to implement support.

Remaining tasks

1. Test payments with 25.5% VAT