Updated from global requirements

Change-Id: I9a60f1b0db78ed188966287939dbd8a6f82c1682

Author: OpenStack Proposal Bot

requirements.txt

@@ -6,7 +6,7 @@ six>=1.9.0 # MIT
 
 Babel!=2.4.0,>=2.3.4 # BSD
 cliff>=2.6.0 # Apache-2.0
-keystoneauth1>=2.18.0 # Apache-2.0
+keystoneauth1>=2.20.0 # Apache-2.0
 openstacksdk>=0.9.14 # Apache-2.0
 osc-lib>=1.5.1 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0