revert is_reset_allowed change

Author: dpkp

kafka/consumer/subscription_state.py

@@ -474,7 +474,7 @@ def reset(self, strategy):
         self.next_allowed_retry_time = None
 
     def is_reset_allowed(self):
-        return (self.next_allowed_retry_time or -1) < time.time()
+        return self.next_allowed_retry_time is None or self.next_allowed_retry_time < time.time()
 
     @property
     def awaiting_reset(self):