Allow type level annotations to be used as meta-annotations

I repeatedly find myself annotating my JPA entities with the very same set of annotations:

```
@Entity
@EntityListeners(AuditingEntityListener.class)
class Person {

}
```

If both @Entity and @EntityListener were allowed to be used as meta-annotations I could collapse them into:

```
@Target(TYPE)
@Retention(RUNTIME)
@Entity
@EntityListeners(AuditingEntityListener.class)
@interface @AuditedEntity {

}
```

Resulting in:

```
@AuditedEntity
class Person {

}
```

This is in line with the meta-annotation handling CDI exposes to introduce annotation with richer semantics in annotation code. The following changes would be required.

* Add ElementType.ANNOTATION_TYPE to the relevant annotations
* Specify that persistence providers have to evaluate the annotations from the meta-level as well using the first one found, so that locally defined annotations would be considered first.