Replace deprecated Persistent import with recommended one.

This has been deprecated at least in Zope 2.8.8, maybe earlier.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2227 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/tests/functional/testClient.py

@@ -23,7 +23,7 @@ from struct import pack, unpack
 from ZODB.FileStorage import FileStorage
 from ZODB.POSException import ConflictError
 from ZODB.tests.StorageTestBase import zodb_pickle
-from Persistence import Persistent
+from persistent import Persistent
 
 from neo.tests.functional import NEOCluster, NEOFunctionalTest
 

neo/tests/functional/testCluster.py

@@ -19,7 +19,7 @@ import unittest
 import transaction
 
 from ZODB.tests.StorageTestBase import zodb_pickle
-from Persistence import Persistent
+from persistent import Persistent
 
 from neo.tests.functional import NEOCluster, NEOFunctionalTest
 

neo/tests/functional/testStorage.py

@@ -17,7 +17,7 @@
 
 import unittest
 import transaction
-from Persistence import Persistent
+from persistent import Persistent
 
 from neo.tests.functional import NEOCluster, NEOFunctionalTest
 from neo.protocol import ClusterStates, NodeStates