Fix new flake8 from pyflakes 2.2.0 release

awx/main/dispatch/periodic.py

@@ -22,7 +22,7 @@ class Scheduler(Scheduler):
 
         def run():
             ppid = os.getppid()
-            logger.warn(f'periodic beat started')
+            logger.warn('periodic beat started')
             while True:
                 if os.getppid() != ppid:
                     # if the parent PID changes, this process has been orphaned

awx/main/dispatch/worker/base.py

@@ -123,9 +123,9 @@ class AWXConsumerRedis(AWXConsumerBase):
                 res = json.loads(res[1])
                 self.process_task(res)
             except redis.exceptions.RedisError:
-                logger.exception(f"encountered an error communicating with redis")
+                logger.exception("encountered an error communicating with redis")
             except (json.JSONDecodeError, KeyError):
-                logger.exception(f"failed to decode JSON message from redis")
+                logger.exception("failed to decode JSON message from redis")
             if self.should_stop:
                 return
 

awx/main/dispatch/worker/callback.py

@@ -91,7 +91,7 @@ class CallbackBrokerWorker(BaseWorker):
                     for e in events:
                         try:
                             if (
-                                isinstance(exc, IntegrityError),
+                                isinstance(exc, IntegrityError) and
                                 getattr(e, 'host_id', '')
                             ):
                                 # this is one potential IntegrityError we can