self methods in validation attributes

[pozitronik]

There's an issue when using any parametrized self method in any validation rule as lambda function:

    def rules(self) -> Rules:
        return [
            {
                'parameter': {'log', 'logfile'},
                'attribute': 'logfile',
                'default': None,
                'valid': lambda attribute, value: self.init_logger(self, value),  # <===
                'help': 'Path to the log file'
            }
        ]

ValueValidator calls any validation method as static, therefore it is required to pass self as first parameter to preserve right context, which is breaking code validation.
The possible solution is to check method context in ValueValidator, and add self explicitly.