Return HTTP status code 204 in API when project successfully closed. Fixes #1689

gns3server/handlers/api/controller/project_handler.py

@@ -166,8 +166,7 @@ class ProjectHandler:
         controller = Controller.instance()
         project = controller.get_project(request.match_info["project_id"])
         await project.close()
-        response.set_status(201)
-        response.json(project)
+        response.set_status(204)
 
     @Route.post(
         r"/projects/{project_id}/open",

tests/handlers/api/controller/test_project.py

@@ -148,7 +148,7 @@ def test_delete_project_invalid_uuid(http_controller):
 def test_close_project(http_controller, project):
     with asyncio_patch("gns3server.controller.project.Project.close", return_value=True) as mock:
         response = http_controller.post("/projects/{project_id}/close".format(project_id=project.id), example=True)
-        assert response.status == 201
+        assert response.status == 204
         assert mock.called