Spring Introduce copyProperties() in BeanUtils for copying specific properties

When a bean has a lot of properties, copyProperties() by ignore ones is not convenient if we want to copy a few of fields.

Comment From: yurizp

I think it's a good idea to create tests to validate this functionality.

Comment From: snicoll

Thanks for the PR but BeanUtils is mostly for our own use within the framework and we prefer not to extend its surface API.