Updated from global requirements

Change-Id: I49cfc47d791d890941dc199bd0d5fa0205b1f1ca

Author: OpenStack Proposal Bot

requirements.txt

@@ -5,7 +5,7 @@ pbr>=1.6 # Apache-2.0
 six>=1.9.0 # MIT
 
 Babel>=1.3 # BSD
-cliff!=1.16.0,>=1.15.0 # Apache-2.0
+cliff!=1.16.0,!=1.17.0,>=1.15.0 # Apache-2.0
 keystoneauth1>=2.1.0 # Apache-2.0
 openstacksdk>=0.7.4 # Apache-2.0
 os-client-config>=1.13.1 # Apache-2.0