structures: clean names that start with numbers

Reason: to fix issues where the name in the server XML is 2D or 3D;
Due to the Symbolic name is not being used

Author: Robert Huemmer

opcua/common/structures.py

@@ -205,7 +205,7 @@ def _make_model(self, root):
         for child in root.iter("{*}EnumeratedType"):
             intenum = EnumType(child.get("Name"))
             for xmlfield in child.iter("{*}EnumeratedValue"):
-                name = xmlfield.get("Name")
+                name = _clean_name(xmlfield.get("Name"))
                 value = xmlfield.get("Value")
                 enumvalue = EnumeratedValue(name, value)
                 intenum.fields.append(enumvalue)