conformance test runs in single mode

Signed-off-by: Amit Mor <amit.mor@hotmail.com>

pubsub/aws/snssqs/snssqs.go

@@ -562,7 +562,7 @@ func (s *snsSqs) callHandler(message *sqs.Message, queueInfo *sqsQueueInfo, hand
 		return fmt.Errorf("failed loading topic (sanitized): %s from internal topics cache. SNS topic might be just created", sanitizedTopic)
 	}
 
-	s.logger.Debugf("Processing SNS message id: %s of topic: %s", message.MessageId, sanitizedTopic)
+	s.logger.Debugf("Processing SNS message id: %s of topic: %s", *message.MessageId, sanitizedTopic)
 
 	ctx, cancelFn := context.WithCancel(s.ctx)
 	defer cancelFn()

tests/config/pubsub/aws/snssqs/pubsub.yml

@@ -24,4 +24,6 @@ spec:
     - name: messageWaitTimeSeconds
       value: 1
     - name: messageMaxNumber
-      value: 10
+      value: 10
+    - name: concurrencyMode
+      value: "single"