HV-905 Providing a global config for auto unwrapping

An early attempt. Any thoughts on the direction?
Wow, the discussion got very deep :)

If you two, who are experts in Hibernate Validator, cannot agree on what's consistent, how would the average user? I feel that an average user will certainly get confused by implicit unwrapping, global unwrapping, and annotation unwrapping.

I really think a simpler approach is needed here. Keep it stupid simple, which for me translate to: `@UnwrapValidatedValue` present ? unwrap, else, do not unwrap.

If you really think about it, all of this complexity came just because it looks undesirable to have extra `@UnwrapValidatedValue` annotations. Yes it's not ideal, but at what cost?