Component validation API following JSR 303

[GuusLieben]

Related problem

Exact specification pending

Requested feature

Implement a validation processor which handles component validation (mostly) following the JSR 303 specification. This should allow users to validate application managed components, provided components, entities, or other objects.

This should be performed through a component processor which runs near the latest processing order. Configuration should be exposed through a publicly accessible API, so users can configure the scope of validation, as well as which validation techniques should be enabled.

Additional metadata decorators should be provided, to disable validation on specific components, whether that is entirely or only for specific validations.