Use absolute import when importing the _utils module for replacing os.listdir.
Use absolute import when importing the _utils module for replacing os.listdir.

Fixes a problem with Python 2.5 where _utils would not be found by the utils
module.



git-svn-id: 9d763a2146cc7918956fa045a5de4b112f309167@4420 a8f5125c-1e01-0410-8897-facf34644b8e

freevo/kaa-base,freevo/kaa-base