[validation] Tidy Up ValidationResult class
[validation] Tidy Up ValidationResult class

Minor style fixups and comment updates.

This is purely a style change. There is no change in behavior.


Former-commit-id: d9ab8b83d9b1dacf028d589f3dc5cf6f39641415
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin