Fix tests

Author: AlexVelezLl

contentcuration/contentcuration/tests/fixtures/tree.json

@@ -13,25 +13,29 @@
 					"node_id": "00000000000000000000000000000003",
 					"kind_id": "video",
 					"title": "Video 1",
-					"sort_order": 1
+					"sort_order": 1,
+					"extra_fields": {}
 				},
 				{
 					"node_id": "00000000000000000000000000000004",
 					"kind_id": "video",
 					"title": "Video 2",
-					"sort_order": 2
+					"sort_order": 2,
+					"extra_fields": {}
 				},
 				{
 					"node_id": "00000000000000000000000000000006",
 					"kind_id": "video",
 					"title": "Video 3",
-					"sort_order": 3
+					"sort_order": 3,
+					"extra_fields": {}
 				},
 				{
 					"node_id": "00000000000000000000000000000007",
 					"kind_id": "video",
 					"title": "Video 4",
-					"sort_order": 4
+					"sort_order": 4,
+					"extra_fields": {}
 				}
 			]
 		},
@@ -104,7 +108,8 @@
 								}
 							]
 						}
-					]
+					],
+					"extra_fields": {}
 				}
 			]
 		}