Return command_line and node_directory via the controller

tests/compute/docker/test_docker_vm.py

@@ -63,7 +63,7 @@ def test_json(vm, project):
         'aux': vm.aux,
         'start_command': vm.start_command,
         'environment': vm.environment,
-        'vm_directory': vm.working_dir
+        'node_directory': vm.working_dir
     }