Updated from global requirements

Change-Id: Ie503f1ed6f6f91adfcf40f71053ba4fec02179f3

Author: OpenStack Proposal Bot

requirements.txt

@@ -8,7 +8,7 @@ Babel>=1.3
 cliff>=1.14.0 # Apache-2.0
 cliff-tablib>=1.0
 os-client-config>=1.4.0
-oslo.config>=1.11.0 # Apache-2.0
+oslo.config>=2.1.0 # Apache-2.0
 oslo.i18n>=1.5.0 # Apache-2.0
 oslo.utils>=1.9.0 # Apache-2.0
 python-glanceclient>=0.18.0