Fix netconf plugin dispatch response (ansible#54326)

Fixes ansible#53236

*  If dispatch() rpc response has data element
   return the xml string from `<data>` element
   else return the complete xml string from
   `<rpc-reply>`.

lib/ansible/plugins/netconf/__init__.py

@@ -211,7 +211,7 @@ def dispatch(self, rpc_command=None, source=None, filter=None):
             raise ValueError('rpc_command value must be provided')
         req = fromstring(rpc_command)
         resp = self.m.dispatch(req, source=source, filter=filter)
-        return resp.data_xml if hasattr(resp, 'data_xml') else resp.xml
+        return resp.data_xml if resp.data_ele else resp.xml
 
     @ensure_connected
     def lock(self, target="candidate"):