NXP-15975 / NXP-16068 : Core Extended Field : ExternalReferenceResolver : cleanup RuntimeException from signatures
NXP-15975 / NXP-16068 : Core Extended Field : External Reference : remove DocumentModel standard accessor updates
NXP-15975 / NXP-16068 : Core Extended Field : ExternalReference is now ObjectResolver + API simplified
NXP-15975 / NXP-16069 : DocumentValidationService : return DocumentValidationReport rather than List<ConstraintViolation>
NXP-15975 / NXP-16068 : Core Extended Field : Resolver : rename packages