Apply suggestions from code review

Co-authored-by: Sebastian <sebix@sebix.at>

Author: kamil-certat

CHANGELOG.md

@@ -12,7 +12,7 @@
 ### Configuration
 
 ### Core
-- Fix maintaining pipeline connection when using AMQP (PR# by Kamil Mankowski).
+- AMQP: Fix maintaining pipeline connection when during interrupted connections (PR#2533 by Kamil Mankowski).
 
 ### Development
 

intelmq/lib/pipeline.py

@@ -608,10 +608,7 @@ def _send(self, destination_queue, message, reconnect=True):
                                                 mandatory=True,
                                                 )
         except Exception as exc:  # UnroutableError, NackError in 1.0.0
-            if reconnect and (
-                isinstance(exc, pika.exceptions.ConnectionClosed) or
-                isinstance(exc, pika.exceptions.StreamLostError)
-            ):
+            if reconnect and isinstance(exc, (pika.exceptions.ConnectionClosed, pika.exceptions.StreamLostError)):
                 self.logger.debug('Error sending the message. '
                                   'Will re-connect and re-send.',
                                   exc_info=True)