Fix bug where the namespace of a nodeid is migrated twice

This results in the nodeid having a wrong namespace.

Author: Andreas Monsch

opcua/common/xmlimporter.py

@@ -54,7 +54,8 @@ def import_xml(self, xmlpath=None, xmlstring=None):
         self.parser = xmlparser.XMLParser(xmlpath, xmlstring)
 
         self.namespaces = self._map_namespaces(self.parser.get_used_namespaces())
-        self.aliases = self._map_aliases(self.parser.get_aliases())
+        self._unmapped_aliases = self.parser.get_aliases()
+        self.aliases = self._map_aliases(self._unmapped_aliases)
         self.refs = []
 
         dnodes = self.parser.get_node_datas()
@@ -163,7 +164,7 @@ def _to_nodeid(self, nodeid):
             return ua.NodeId(getattr(ua.ObjectIds, nodeid))
         else:
             if nodeid in self.aliases:
-                return self.aliases[nodeid]
+                return self._to_nodeid(self._unmapped_aliases[nodeid])
             else:
                 return ua.NodeId(getattr(ua.ObjectIds, nodeid))