Simple literal setting does not work for annotation properties

[ledsoft]

Setting simpleLiteral=true has no effect when used in OWLAnnotationProperty, JOPA will still attempt to resolve whether the value is an IRI or a literal value, which can lead to unexpected results (#167 ).

@OWLAnnotationProperty(iri = RDFS.LABEL, simpleLiteral=true)
protected String name;

should ensure that the value is always stored as a simple literal.