Finish up flake8 conversion.

Change-Id: I5034f19d5f9b20ad2b4569455273c730b1efec08
diff --git a/stress/test_floating_ips.py b/stress/test_floating_ips.py
index 6774e81..c5bad95 100755
--- a/stress/test_floating_ips.py
+++ b/stress/test_floating_ips.py
@@ -15,8 +15,8 @@
 import random
 import telnetlib
 
-import pending_action
-import test_case
+from stress import pending_action
+from stress import test_case
 
 
 class TestChangeFloatingIp(test_case.StressTestCase):