Use cStringIO if available.
This attempts to import cStringIO then will fall back on the
six.StringIO import if cStringIO can't be found. This means on python2
we should get cStringIO if available otherwise we get the right StringIO
on both python2 and python3.
Change-Id: I046eb72f6b6ed4801ea43900d2516918fdefbe95
diff --git a/tests/base.py b/tests/base.py
index 463e873..2f07b1d 100755
--- a/tests/base.py
+++ b/tests/base.py
@@ -28,7 +28,10 @@
import select
import shutil
from six.moves import reload_module
-from six import StringIO
+try:
+ from cStringIO import StringIO
+except Exception:
+ from six import StringIO
import socket
import string
import subprocess