Fix deprecation warning by using is_set

python/nav/ipdevpoll/jobs.py

@@ -319,7 +319,7 @@ def log_abort(failure):
             return failure
 
         def save(result):
-            if self.cancelled.isSet():
+            if self.cancelled.is_set():
                 return wrap_up_job(result)
 
             df = self._save_container()
@@ -524,7 +524,7 @@ def _container_factory(self, container_class, key, *args, **kwargs):
 
     def _raise_if_cancelled(self):
         """Raises an AbortedJobError if the current job is cancelled"""
-        if self.cancelled.isSet():
+        if self.cancelled.is_set():
             raise AbortedJobError("Job was already cancelled")
 
     @classmethod