cds-java-artefacts-1.2.0

Supports the v1.2.0 of the Consumer Data Standards. These changes focused on the simplification of the platform to support future updates to the standards:

• Removed the Codegen module, resulting in the removal of the api-model module.
• Replaced the reference-test module with integration-test which refers to the client module instead of the api-model.
• Refactored client-cli to accommodate the removal of api-model and reference-test.
• A number of small bug fixes.