Updated from global requirements

Change-Id: If070122805497e0943918900c6d1f6a54faef37a

Author: OpenStack Proposal Bot

requirements.txt

@@ -7,7 +7,7 @@ six>=1.9.0 # MIT
 Babel>=1.3 # BSD
 cliff>=1.15.0 # Apache-2.0
 keystoneauth1>=2.1.0 # Apache-2.0
-openstacksdk # Apache-2.0
+openstacksdk>=0.7.4 # Apache-2.0
 os-client-config>=1.13.1 # Apache-2.0
 oslo.config>=3.4.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0