unrequested changes: commons-logging dependency marked provided (to avoid redundant jar inclusion), removed unused imports in classes that were modified
* Boyscouting: Docker conventions
* Boyscouting: JUnit 5 conventions ("It is generally recommended to omit the public modifier for test classes, test methods, and lifecycle methods unless there is a technical reason for doing so)"
* Boyscouting: typo in RepositoryValidationInterceptorFactoryDstu3
* Boyscouting: use List.of instead of Guava; use StandardCharsets instead of Guava; remove unused imports
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Co-authored-by: Gerlach, Winfried <Winfried.Gerlach@draeger.com>
