Fix tests (#386)

Fix federated validation test cases as they are broken. Fixes are:
- The current `dev` is missing an import, adding the import back.
- Copying previous commit implementation over.

---------

Co-authored-by: Denis Kolegov <dnkolegov@gmail.com>
Co-authored-by: auto-commit <auto-commit@users.noreply.github.com>

.out/ConsensusType.sol/ConsensusType.json

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.out/Constants.sol/Constants.json

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