add newline at end of test_admin_integration.py

Author: Swen

test/test_admin_integration.py

@@ -301,4 +301,4 @@ def test_delete_consumergroups_with_errors(kafka_admin_client, kafka_consumer_fa
     consumergroups = {group_id for group_id, _ in kafka_admin_client.list_consumer_groups()}
     assert "test2-group1" not in consumergroups
     assert "test2-group2" in consumergroups
-    assert "test2-group3" not in consumergroups
+    assert "test2-group3" not in consumergroups