Enable E128 ignore E129

After bumping the hacking version to the 0.9.x series ignores were
added for several rules. This commit fixes the violations for a subset
of these rules and re-enables the checks.

Change-Id: Iaff25fc9e2ecfad0c0574b39ddce0c5188d6c31f
diff --git a/tox.ini b/tox.ini
index 88a8cfa..b3d4397 100644
--- a/tox.ini
+++ b/tox.ini
@@ -110,7 +110,8 @@
 # E125 is a won't fix until https://github.com/jcrocholl/pep8/issues/126 is resolved.  For further detail see https://review.openstack.org/#/c/36788/
 # H402 skipped because some docstrings aren't sentences
 # E123 skipped because it is ignored by default in the default pep8
-# Skipped because of new hacking 0.9: H405,H904,E129,E128
-ignore = E125,H402,E123,H404,H405,H904,E129,E128
+# E129 skipped because it is too limiting when combined with other rules
+# Skipped because of new hacking 0.9: H405,H904
+ignore = E125,H402,E123,E129,H404,H405,H904
 show-source = True
 exclude = .git,.venv,.tox,dist,doc,openstack,*egg