WFLY-1705 JPA should be able to access the CDI-enabled ValidatorFactory

Removed the JPALazyValidatorFactory and the SerializableValidatorFactory and retrieved the EE LazyValidatorFactory from the deploymentUnit attachment instead. Wait until the second JPA persistence unit bootstrap phase to make use of this ValidatorFactory.

More details in https://issues.jboss.org/browse/WFLY-1705