#7973 

Adding test cases for consensus features 

### Checklist
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~- [ ] I submit my changes into the `develop` branch~
~- [ ] I have created a changelog fragment <!-- see top comment in
CHANGELOG.md -->~
~- [ ] I have updated the documentation accordingly~
- [x] I have added tests to cover my changes
- [x] I have linked related issues (see [GitHub docs](

https://help.github.com/en/github/managing-your-work-on-github/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword))
~- [ ] I have increased versions of npm packages if it is necessary

([cvat-canvas](https://github.com/cvat-ai/cvat/tree/develop/cvat-canvas#versioning),

[cvat-core](https://github.com/cvat-ai/cvat/tree/develop/cvat-core#versioning),

[cvat-data](https://github.com/cvat-ai/cvat/tree/develop/cvat-data#versioning)
and

[cvat-ui](https://github.com/cvat-ai/cvat/tree/develop/cvat-ui#versioning))~

### License

- [x] I submit _my code changes_ under the same [MIT License](
https://github.com/cvat-ai/cvat/blob/develop/LICENSE) that covers the
project.
  Feel free to contact the maintainers if that's a concern.

---------

Co-authored-by: Dmitrii Lavrukhin <[email protected]>
Co-authored-by: Rodrigo Agundez <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Boris Sekachev <[email protected]>
Co-authored-by: Kirill Lakhov <[email protected]>
Co-authored-by: smit <[email protected]>
Co-authored-by: Roman Donchenko <[email protected]>
Co-authored-by: cvat-bot[bot] <147643061+cvat-bot[bot]@users.noreply.github.com>
Co-authored-by: Andrey Zhavoronkov <[email protected]>
Co-authored-by: Maxim Zhiltsov <[email protected]>
Co-authored-by: Maria Khrustaleva <[email protected]>