Make HibernateAnnotationScanning more lenient in handling annotated entities

Frameworks such as Spring Roo may place @Entity annotations via bytecode manipulation (since compilation is impossible) on methods, as in:

@Aspect
@ajcPrivileged
public class Owner_Roo_Entity
{
 
....
  @Entity
  @ajcDeclareAnnotation(pattern="com.springsource.petclinic.domain.Owner", annotation="@Entity", kind="at_type")
  void ajc$declare_at_type_1()
  {
  }
....
}

This causes HibernateAnnotationScanner to crash with a CNFE on 'ajc$declare_at_type_1'.

Solution: make HibernateAnnotationScanner ignore these