Update hacking for Python3
The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.
Fix problems found.
Change-Id: Ia59a23a36ebb8548a20e894000f7342c73012eac
diff --git a/tox.ini b/tox.ini
index 4591a45..921fee1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,8 +26,9 @@
[flake8]
# E123, E125 skipped as they are invalid PEP-8.
+# W504 line break after binary operator
show-source = True
-ignore = E123,E125
+ignore = E123,E125,W504
builtins = _
exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build