lint: fix wrong-import-order warnings

Newer pylint is able to enforce PEP8 module ordering.  Respect it.

BUG=chromium:863669
TEST=`cros lint` no longer reports this

Change-Id: I4d4f7669d6dcced7e0d1ceeffd949a818b867055
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1768870
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/venv_check.py b/scripts/venv_check.py
index 67fa17c..01976aa 100644
--- a/scripts/venv_check.py
+++ b/scripts/venv_check.py
@@ -7,16 +7,18 @@
 
 from __future__ import print_function
 
-from chromite.lib import commandline
-
 import sys
 import pprint
 
+from chromite.lib import commandline
+
+
 def GetParser():
   """Creates the argparse parser."""
   parser = commandline.ArgumentParser(description=__doc__)
   return parser
 
+
 def main(argv):
   parser = GetParser()
   parser.parse_args(argv)