Update hacking for Python3

The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.

Fix problems found by updated hacking version.

Update local hacking checks for new flake8.

Remove hacking and friends from lower-constraints, they are not
needed in installations.

Change-Id: I67e5ca24c550163c218fb06692de0b7c528d8318

1 files changed, 6 insertions, 2 deletions

diff --git a/tox.ini b/tox.ini
index 09b93e82a..d94bd279e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -192,8 +192,12 @@ show-source = True
 enable-extensions = H203,H106
 exclude=.eggs,.git,.tox,doc
 
-[hacking]
-local-check-factory = kolla.hacking.checks.factory
+[flake8:local-plugins]
+extension =
+    D703 = checks:check_explicit_underscore_import
+    K301 = checks:no_mutable_default_args
+    K302 = checks:no_log_warn
+paths = ./kolla/hacking
 
 [testenv:lower-constraints]
 deps =