quiet subtask tracebacks to debug level

Author: carver

p2p/service.py

@@ -135,7 +135,7 @@ async def _run_task_wrapper() -> None:
                 pass
             except Exception as e:
                 self.logger.warning("Task %s finished unexpectedly: %s", awaitable, e)
-                self.logger.warning("Task failure traceback", exc_info=True)
+                self.logger.debug("Task failure traceback", exc_info=True)
             else:
                 self.logger.debug("Task %s finished with no errors", awaitable)
         self._tasks.add(asyncio.ensure_future(_run_task_wrapper()))