Updated from global requirements

Change-Id: Id1468c3882547d908b92a598cbb53196c139cf8a

Author: OpenStack Proposal Bot

requirements.txt

@@ -6,7 +6,7 @@ six>=1.9.0 # MIT
 
 Babel>=2.3.4 # BSD
 cliff>=2.3.0 # Apache-2.0
-keystoneauth1>=2.14.0 # Apache-2.0
+keystoneauth1>=2.16.0 # Apache-2.0
 openstacksdk>=0.9.10 # Apache-2.0
 osc-lib>=1.2.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0