Merge "Move cinderclient to new hacking 4.0.0"

test-requirements.txt

@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 # Hacking already pins down pep8, pyflakes and flake8
 
-hacking>=3.1.0,<3.2.0 # Apache-2.0
+hacking>=4.0.0,<4.1.0 # Apache-2.0
 docutils>=0.15.2
 coverage>=5.2.1 # Apache-2.0
 ddt>=1.4.1 # MIT