Use CBS Payment API v2
Same idea as !52 (merged). This PR doesn't touch the integration tests, which I'll finish all at once to avoid merge conflicts.
Please review: @ahoffmann @weizhong-wang @lloyd-carter @KJOYNER
Improve security with one click by enabling Secret Push Protection for your projects: https://docs.gitlab.com/ee/user/application_security/secret_detection/secret_push_protection/#enable-secret-push-protection-in-a-project
Same idea as !52 (merged). This PR doesn't touch the integration tests, which I'll finish all at once to avoid merge conflicts.
Please review: @ahoffmann @weizhong-wang @lloyd-carter @KJOYNER