Validator transfer from fixtures.py to validators directory, Part 2

[lrafeei]

This is part 2 of 5 for the transfer of the validators from fixtures.py to the validators directory.

[github-actions]

🦙 MegaLinter status: ❌ ERROR

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	36	0	0	2.53s
✅ PYTHON	flake8	36		0	1.37s
✅ PYTHON	isort	36	0	0	0.27s
❌ PYTHON	pylint	36		64	11.87s

See errors details in artifact MegaLinter reports on CI Job page
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

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[hmstepanek]

Looks good, just a couple fixups.