Don't create directory structure during json dump. Fixes #2270

gns3server/compute/base_node.py

@@ -233,6 +233,14 @@ class BaseNode:
 
         return self._project.node_working_directory(self)
 
+    @property
+    def working_path(self):
+        """
+        Return the node working path. Doesn't create structure of directories when not present.
+        """
+
+        return self._project.node_working_path(self)
+
     @property
     def temporary_directory(self):
         if self._temporary_directory is None: