Fix OperationLimits data type to UInt32

According to OPC Unified Architecture, Part 5, 6.3.11
OperationLimitsType all Max* properties shall have datatype
UInt32.

Fix this by explicitly setting the variant type to UInt32
instead of defaulting to Int64.

This fixes connectivity issues with the KepwareServerEx OPC-UA client.

Introduced in 21432df9

asyncua/server/internal_server.py

@@ -103,7 +103,7 @@ class InternalServer:
             attr = ua.WriteValue()
             attr.NodeId = ua.NodeId(nodeid)
             attr.AttributeId = ua.AttributeIds.Value
-            attr.Value = ua.DataValue(ua.Variant(10000), ua.StatusCode(ua.StatusCodes.Good))
+            attr.Value = ua.DataValue(ua.Variant(10000, ua.VariantType.UInt32), ua.StatusCode(ua.StatusCodes.Good))
             attr.Value.ServerTimestamp = datetime.utcnow()
             params.NodesToWrite.append(attr)
         result = await self.isession.write(params)
@@ -126,7 +126,7 @@ class InternalServer:
             # path was supplied, but file doesn't exist - create one for next start up
             await self.loop.run_in_executor(None, self.aspace.make_aspace_shelf, shelf_file)
 
-    def _address_space_fixes(self) -> Coroutine:
+    async def _address_space_fixes(self) -> Coroutine:
         """
         Looks like the xml definition of address space has some error. This is a good place to fix them
         """
@@ -136,13 +136,17 @@ class InternalServer:
         it.IsForward = False
         it.TargetNodeId = ua.NodeId(ua.ObjectIds.ObjectTypesFolder)
         it.TargetNodeClass = ua.NodeClass.Object
+
         it2 = ua.AddReferencesItem()
         it2.SourceNodeId = ua.NodeId(ua.ObjectIds.BaseDataType)
         it2.ReferenceTypeId = ua.NodeId(ua.ObjectIds.Organizes)
         it2.IsForward = False
         it2.TargetNodeId = ua.NodeId(ua.ObjectIds.DataTypesFolder)
         it2.TargetNodeClass = ua.NodeClass.Object
-        return self.isession.add_references([it, it2])
+
+        results = await self.isession.add_references([it, it2])
+        for res in results:
+            res.check()
 
     def load_address_space(self, path):
         """