on node export only output TypeId for vars/objects (#1574)

only output the DataTypeDefinitionId and ReferenceTypeId vor var/objects
fixes nodeset output of #1532 
fixes OPCFoundation/UA-ModelCompiler#94

Stack/Opc.Ua.Core/Stack/State/BaseInstanceState.cs

@@ -529,7 +529,7 @@ protected override void Export(ISystemContext context, Node node)
                 node.ReferenceTable.Add(referenceTypeId, true, this.Parent.NodeId);
             }
 
-            if (!NodeId.IsNull(this.TypeDefinitionId))
+            if (!NodeId.IsNull(this.TypeDefinitionId) && (NodeClass == NodeClass.Object || NodeClass == NodeClass.Variable))
             {
                 node.ReferenceTable.Add(ReferenceTypeIds.HasTypeDefinition, false, this.TypeDefinitionId);
             }
@@ -556,7 +556,7 @@ public override void Save(ISystemContext context, XmlEncoder encoder)
                 encoder.WriteNodeId("ReferenceTypeId", m_referenceTypeId);
             }
 
-            if (!NodeId.IsNull(m_typeDefinitionId))
+            if (!NodeId.IsNull(m_typeDefinitionId) && (NodeClass == NodeClass.Object || NodeClass == NodeClass.Variable))
             {
                 encoder.WriteNodeId("TypeDefinitionId", m_typeDefinitionId);
             }