[tests] Avoid Celery logging interference in connection tests

The connection task test patched all Logger.info calls, so Celery's
eager task success log could become the final mocked call and fail the
assertion when the test was reused by extended apps.

Patch only the connection task logger to keep the assertion focused on
the application log emitted by update_config.

Author: nemesifier

openwisp_controller/connection/tests/test_tasks.py

@@ -94,7 +94,7 @@ def test_update_config_missing_device(self, mocked_sleep, mocked_warning):
         )
         mocked_sleep.assert_called_once()
 
-    @mock.patch("logging.Logger.info")
+    @mock.patch("openwisp_controller.connection.tasks.logger.info")
     @mock.patch("time.sleep")
     def test_update_config_skipped_for_deactivated_device(
         self, mocked_sleep, mocked_info