Fix test

Author: ianton-ru

tests/integration/helpers/iceberg_utils.py

@@ -500,7 +500,7 @@ def default_download_directory(
 
 
 def execute_spark_query_general(
-    spark, started_cluster, storage_type: str, table_name: str, query: str, additional_nodes=[]
+    spark, started_cluster, storage_type: str, table_name: str, query: str, additional_nodes=None
 ):
     spark.sql(query)
     default_upload_directory(
@@ -509,6 +509,7 @@ def execute_spark_query_general(
         f"/iceberg_data/default/{table_name}/",
         f"/iceberg_data/default/{table_name}/",
     )
+    additional_nodes = additional_nodes or []
     for node in additional_nodes:
         additional_upload_directory(
             started_cluster,