vstart_runner: be python3 compatible

Signed-off-by: Kefu Chai <kchai@redhat.com>
(cherry picked from commit a9906b8cd21ef2ffea7ba9298951542843433287)

diff --git a/qa/tasks/vstart_runner.py b/qa/tasks/vstart_runner.py
index 419ab533224002a9b392928f6f83d89983d86d89..8e1a43b4a22e2db24bc14c051d35e32f51d247ee 100644 (file)
--- a/qa/tasks/vstart_runner.py
+++ b/qa/tasks/vstart_runner.py
@@ -30,7 +30,7 @@ Alternative usage:
 
 """
 
-from StringIO import StringIO
+from six import StringIO
 from collections import defaultdict
 import getpass
 import signal