[tko] Sanitize imports

BUG=chromium:682417
TEST=None

Change-Id: I876698190f052d5673083bbe91729866457e5af6
Reviewed-on: https://chromium-review.googlesource.com/437909
Commit-Ready: Prathmesh Prabhu <pprabhu@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/tko/parsers/version_0.py b/tko/parsers/version_0.py
index 64b720d..8e697e1 100644
--- a/tko/parsers/version_0.py
+++ b/tko/parsers/version_0.py
@@ -1,5 +1,10 @@
-import re, os
-from autotest_lib.tko import utils as tko_utils, models, status_lib
+import os
+import re
+
+import common
+from autotest_lib.tko import models
+from autotest_lib.tko import status_lib
+from autotest_lib.tko import utils as tko_utils
 from autotest_lib.tko.parsers import base
 
 class NoHostnameError(Exception):