OZG-6831 KOP-2728 Allow missing party identifier type

src/main/resources/wsdl/OSCI_MessageMetaData_V2.02.xsd

@@ -139,7 +139,7 @@
     </xs:annotation>
     <xs:simpleContent>
       <xs:extension base="xs:normalizedString">
-        <xs:attribute name="type" type="oscimeta:NonEmptyStringType" use="required">
+        <xs:attribute name="type" type="oscimeta:NonEmptyStringType">
           <xs:annotation>
             <xs:documentation>Orientation: ebMS Core: type, how to interpret Party-Id value, e.g.: xöv oder Justiz</xs:documentation>
           </xs:annotation>