Provide random data generator for testdata generator

[ahoerning]

When creating an object for testing issues, sometimes random data is needed. Therefore creating random testdata for (at least primitive) Attributes could be integrated into the generator (e.g. String: random alphanumeric)

Furthermore, when creating the builder from entities, it may also be possible to extract the JPA Metadata (field length, etc.). On this way the random data generator could produce more consistent data.

[github-actions[bot]]

Stale topic. Please negotiate closing or discussing the relevance of this ticket.