Use upper constraints in pep8 test run
this is to avoid current problem due to
https://github.com/mtreinish/stestr/issues/347
but also to equalize dependencies with other test envs.
Change-Id: I867bec362d83ab820aa6b11dc4770d50133ecdbf
diff --git a/tox.ini b/tox.ini
index fc882cf..e809f1c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -384,7 +384,7 @@
[testenv:pep8]
deps =
- -r{toxinidir}/test-requirements.txt
+ {[testenv]deps}
autopep8
commands =
autopep8 --exit-code --max-line-length=79 --experimental --diff -r tempest setup.py