Fix Exception when opening project that contains an IOU node

Fix #636

gns3server/compute/iou/iou_vm.py

@@ -218,7 +218,6 @@ class IOUVM(BaseNode):
                        "l1_keepalives": self._l1_keepalives,
                        "startup_config": self.relative_startup_config_file,
                        "private_config": self.relative_private_config_file,
-                       "iourc_path": self.iourc_path,
                        "use_default_iou_values": self._use_default_iou_values,
                        "command_line": self.command_line}
 

gns3server/schemas/iou.py

@@ -199,10 +199,6 @@ IOU_OBJECT_SCHEMA = {
             "description": "Use default IOU values",
             "type": ["boolean", "null"]
         },
-        "iourc_path": {
-            "description": "Path of the iourc file used by remote servers",
-            "type": ["string", "null"]
-        },
         "startup_config_content": {
             "description": "Startup-config of IOU",
             "type": ["string", "null"]