This commit adapts nexus 3 integration tests to our new docker-based framework of writing IT. It makes individual tests easier to read and debug. One significant change is that each test now spawns a separate Nexus instance, which requires more memory, but also isolates the tests better.
- Extracted some methods to structure the code better
- Explicitly run the binary with a trivial command first to avoid simple failure reasons (like having a non-linux binary)
This change addresses some issues of the testcontainer based testing approach (much repeated code, API not on the right abstraction level). It introduces new methods that make use of the docker cli, and rewrites the mta tests using this method.
Co-authored-by: Stephan Aßmus <stephan.assmus@sap.com>
