Correct failures for check H703

The H703 "Multiple positional placeholders" rule was failing and
ignored. Now it's enforced.

Change-Id: Id6d3bc1767e264d3f07c4e14758d67e10223f02f

keystonemiddleware/auth_token.py

@@ -1220,8 +1220,8 @@ class AuthProtocol(object):
             current_mode = stat.S_IMODE(os.stat(self._signing_dirname).st_mode)
             if current_mode != stat.S_IRWXU:
                 self._LOG.warning(
-                    _LW('signing_dir mode is %s instead of %s'),
-                    oct(current_mode), oct(stat.S_IRWXU))
+                    _LW('signing_dir mode is %(mode)s instead of %(need)s'),
+                    {'mode': oct(current_mode), 'need': oct(stat.S_IRWXU)})
         else:
             os.makedirs(self._signing_dirname, stat.S_IRWXU)
 

tox.ini

@@ -36,8 +36,7 @@ commands = oslo_debug_helper {posargs}
 # F821: undefined name
 # H304: no relative imports
 # H405: multi line docstring summary not separated with an empty line
-# H703: Multiple positional placeholders
-ignore = E122,F821,H304,H405,H703
+ignore = E122,F821,H304,H405
 show-source = True
 exclude = .venv,.tox,dist,doc,*egg,build,*openstack/common*