Updated openstack/openstack
Project: openstack/nova  bec577d331b50d2cce0a919de0a9da2f6143d3a2
null
ValueError should use '%' instead of ','

ValueError do not support using ',' to connect log and variables,
we should use '%' instead.

Change-Id: I04c2002a970465d8250e5550f6bf992b48845a0d
Closes-Bug: #1261621