[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: 59c4b99828a376d6a1b54edae0f6b3f13e1ae996
syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin2