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
diff --git a/tempest/stress/run_stress.py b/tempest/stress/run_stress.py
index 067b994..889e29a 100755
--- a/tempest/stress/run_stress.py
+++ b/tempest/stress/run_stress.py
@@ -21,7 +21,11 @@
import json
import sys
from testtools.testsuite import iterate_tests
-from unittest import loader
+try:
+ from unittest import loader
+except ImportError:
+ # unittest in python 2.6 does not contain loader, so uses unittest2
+ from unittest2 import loader
from tempest.openstack.common import log as logging
from tempest.stress import driver