Increase scheduler cancel_job_tasks timeout

src/ert/scheduler/scheduler.py

@@ -129,7 +129,7 @@ async def _cancel_job_tasks(self) -> None:
                 task.cancel()
         _, pending = await asyncio.wait(
             self._job_tasks.values(),
-            timeout=1.0,
+            timeout=15.0,
             return_when=asyncio.ALL_COMPLETED,
         )
         for task in pending: