249 rewrite unittests yaml config

[ernstleierzopf]

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• [x] I have read and followed the contributing guide lines at https://github.com/ait-aecid/logdata-anomaly-miner/wiki/Git-development-workflow
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Fixes #1277 Fixes #464

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• [ ] This PR introduces breaking changes
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Describe changes:

• please merge PR #1327 first.
• reviewed unittests and major changes in YamlConfig not necessary.