Update hacking package, fix I18n style issues

Hacking package updated from '>=0.8.0,<0.9' to '>=0.9.2,<0.10'.
Many new style rules have been added, some of which Designate violates.
Only the style rules that pertain to I18n have been addressed.
The rest have been added to the ignore list in tox.ini for further review.

Change-Id: I5c559c491ff9bee2346b1589e7bb7e117137609b
Implements: blueprint standardize-logging
Closes-Bug: bug #1330540

tox.ini

@@ -29,7 +29,26 @@ commands = flake8
 commands = {posargs}
 
 [flake8]
-ignore = H302,H306,H401,H402,H404
+# ignored flake8 codes:
+# H302 import only modules
+# H306 imports not in alphabetical order
+# H401 docstring should not start with a space
+# H402 one line docstring needs punctuation
+# H404 multi line docstring should start with a summary
+
+# TODO: The following ignored codes need review
+# H104 file contains nothing more than comments
+# H236 Python 3.x incompatible __metaclass__, use six.add_metaclass()
+# H305 imports not grouped correctly
+# H307 like imports should be grouped together
+# H405 multi line docstring summary not separated with an empty line
+# H904 Wrap long lines in parentheses instead of a backslash
+# E111 Indentation is not a multiple of four
+# E126 continuation line over-indented for hanging indent
+# E128 continuation line under-indented for visual indent
+# E251 unexpected spaces around keyword / parameter equals
+# E265 Block comment should start with '# '
+ignore = H104,H236,H302,H305,H306,H307,H401,H402,H404,H405,H904,E111,E126,E128,E251,E265
 builtins = _
 exclude = .venv,.git,.tox,dist,doc,*openstack/common*,*openstack/deprecated*,*lib/python*,*egg,build,tools