Changed royalty payment method

[NossicaSystems]

Purpose

Changing the royalty payment method from tokens to ccd

Changes

The payment method needed to invoke the ccd transfer function instead of transferring tokens.
Associated tests were updated accordingly

Checklist

• My code follows the style of this project.
• The code compiles without warnings.
• I have performed a self-review of the changes.
• I have documented my code, in particular the intent of the
  hard-to-understand areas.
• (If necessary) I have updated the CHANGELOG.

CLA acceptance

_Remove if not applicable.

By submitting the contribution I accept the terms and conditions of the
Contributor License Agreement v1.0

• link: https://developers.concordium.com/CLAs/Contributor-License-Agreement-v1.0.pdf

• I accept the above linked CLA.

[NossicaSystems]

@DOBEN, sorry I do not seem to be able to add you as a reviewer directly :-(.
However, I was asked to open this PR for you to look through.