Support dependency injection within Bean Validation constraint validators

CDI should integrate with Bean Validation to support dependency injection within BV ConstraintValidator implementations.

From the BV 1.1 spec early draft:

Java EE should obey the rules defined above and enable Context and Dependency Injection (CDI) support to ValidatorFactory instances. In particular:

• Let Validator and ValidatorFactory object be injectable.
• Use a default ConstraintValidatorFactory implementation that returns CDI managed ConstraintValidator objects. The scope of these instances is dependent as the Bean Validation provider is responsible for them.
• Provide CDI managed instances of ConstraintValidatorFactory, MessageInterpolator and TraversableResovler if customized classes are requested in the XML deployment descriptor.