tree 35b5b190b5e6039b9a02bfdcdfa2f5962dec4592
parent 4c1c88457ec02ba30d899b6142163b08a3998683
author Will <jianwdl@cn.ibm.com> 1389581354 -0500
committer Will <jianwdl@cn.ibm.com> 1390269031 -0500

Python 2.6 do not has unittest.loader, we import unittest2 instead

try to import loader from unittest and if ImportError is caught,
import unittest2 instead

Change-Id: I8a638fb54c9b699ee5a26c7b81965ee170f7ba1d