Added code to fake out BoboPOS.PersistentMapping. Waaaa.

src/ZODB/__init__.py

@@ -98,6 +98,7 @@ if not hasattr(Persistence, 'Persistent'):
     if not hasattr(Persistence, 'PersistentMapping'):
         import PersistentMapping
         sys.modules['PersistentMapping']=PersistentMapping
+        sys.modules['BoboPOS.PersistentMapping']=PersistentMapping
         PersistentMapping=PersistentMapping.PersistentMapping
         from PersistentMapping import PersistentMapping
         Persistence.PersistentMapping=PersistentMapping