Use flake8-import-order

Use the flake8 plugin flake8-import-order to check import ordering. It
can do it automatically and don't need reviewers to check it.

Change-Id: I821fd7467f6c5cc1487149297f26e4ad539cf25d

1 files changed, 1 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index 02d8d26db..be020996a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -94,6 +94,7 @@ commands = {posargs}
 [flake8]
 ignore = E129
 exclude =  .venv,.git,.tox,dist,doc,*lib/python*,*egg,build
+import-order-style = pep8
 max-complexity=17
 # [H106] Don’t put vim configuration in source files.
 # [H203] Use assertIs(Not)None to check for None.