Fix undefined name 'nose'
pyflakes tempest/tests/compute/base.py reported
tempest/tests/compute/base.py:236: undefined name 'nose'
Fixed by adding the import.
Change-Id: I826fa382ea88d289fee310e435eccf1138e793d8
diff --git a/tempest/tests/compute/base.py b/tempest/tests/compute/base.py
index e1b7bdd..5f030fa 100644
--- a/tempest/tests/compute/base.py
+++ b/tempest/tests/compute/base.py
@@ -19,6 +19,7 @@
import time
import unittest2 as unittest
+import nose
from tempest import config
from tempest import openstack