Introduce flake8-import-order

This commit introduces flake8-import-order to check import orders
automatically. We shouldn't do it manually.

Depends-On: Ia2140f5566ce169b076ffa5c9ebfbdbfc41e5bed
Change-Id: Iff75ebec42b295870edd1c04001adfb17460a682
diff --git a/tools/check_logs.py b/tools/check_logs.py
index caad85c..f82b387 100755
--- a/tools/check_logs.py
+++ b/tools/check_logs.py
@@ -19,10 +19,10 @@
 import gzip
 import os
 import re
-import six
-import six.moves.urllib.request as urlreq
 import sys
 
+import six
+import six.moves.urllib.request as urlreq
 import yaml