Merge "Fix missing oslo.versionedobjects library option"

Author: Zuul

etc/nova/nova-config-generator.conf

@@ -14,6 +14,7 @@ namespace = oslo.service.service
 namespace = oslo.middleware
 namespace = oslo.concurrency
 namespace = oslo.reports
+namespace = oslo.versionedobjects
 namespace = keystonemiddleware.auth_token
 namespace = osprofiler
 namespace = os_vif