[xacml-comment] A014, A015

Should use SubjectCategory attribibute...

    <Subject>
        <Attribute
              
AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-category"
              DataType="http://www.w3.org/2001/XMLSchema#anyURI">
            
<AttributeValue>urn:oasis:names:tc:xacml:1.0:subject:subject-category:intermediate-subject</AttributeValue>
        </Attribute>