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New features
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* **artifacts:** add CONFIGS_DUMP.txt to build artifacts
* **code_report:** add support for pylint3 for ubuntu14, restore LogWriterCodeReport
* **report:** update build result reporting, add skipped steps
* **report:** add option to only report failed steps
Bug fixes
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* **report:** remove duplicating comment
* **out:** fix skipped steps reporting
* **configs:** fix critical step handling while merging one-element Variations