Remove redundant dependencies in analysis

[friedrich-roskosch-mw]

Feature request

Description

As a developer, I want fewer dependencies in my projects so that redundant functionality is removed and attack surface is minimized. For example, we have a lot of dependencies/libraries for handling json files and content, maybe we can switch to one single library and use all of its functionality.

Acceptance criteria

Assumptions & Exclusions

In our Weekly on the 13th of September 2022 we decided that this should be an ongoing task, rather than one "big" issue.

Development notes (optional Task Breakdown)

• [ ] Check if we need Wiremock and if yes, switch to the new https://github.com/wiremock/wiremock repository
• [x] Switch from Spek and JUnit4 to JUnit 5 #3202
• [ ] Decide on one assertion plugin ( jsonassert and assertJ, ... ) are currently in use)
• [ ] Decide on one JSON plugin (JSON, GSON, Jackson and jsonassert are currently in use)
• [ ] Unify/Verify which mockking library we use (io.mockk // mockito-core // com.nhaarman.mockitokotlin etc.)
• [ ] Update ADR to write down these decisions for future reference

Open questions

[ChristianHuehn]

I will pull this out and look for a better place to store it, so that we will keep in in mind when developing CC further.