This introduces GET methods for rating modules in the v2 API. Work items:
* Implement the "/v1/rating/modules" endpoints in the v2 API, including
unit tests and documentation
Story: 2006572
Task: 36677
Co-Authored-By: Rafael Weingärtner <rafael@apache.org>
Change-Id: I0a2f24051d268a396955c8df7e3e5615546f6293