meta: convert validation to ozzo

[adamdecaf]

Customers Version: v0.5.0-dev

What were you trying to do?
All data objects need to be properly validated. This involves ensuring their formatting is accepted for the underlying type or they're containing only acceptable characters.

Library: github.com/go-ozzo/ozzo-validation
Example: https://github.com/moov-io/identity/blob/master/pkg/client/validation.go

What did you expect to see?
Data should only be accepted if it is valid.

Implementation Notes
Please do this one package/file at a time. A big change across the project might conflict with other changes in-flight.

[vxio]

We should also add a normalization layer before performing the validations.