Fixed a vague error message in integration tests. [#CLICKHOUSE-2]

dbms/tests/integration/helpers/network.py

@@ -85,6 +85,9 @@ class PartitionManager:
     def __exit__(self, exc_type, exc_val, exc_tb):
         self.heal_all()
 
+    def __del__(self):
+        self.heal_all()
+
 
 class PartitionManagerDisbaler:
     def __init__(self, manager):

dbms/tests/integration/test_distributed_ddl/test.py

@@ -120,8 +120,6 @@ def started_cluster():
             ddl_check_there_are_no_dublicates(instance)
 
     finally:
-        # Remove iptables rules for sacrifice instance
-        cluster.pm_random_drops.heal_all()
         cluster.shutdown()