Updated openstack/openstack
Project: openstack/nova  325c7e37f2876c036d168da9b9ac1c03abeddc34
null
Fix debug message formatting in server_external_events

Hopefully this will be the last case of invalid debug log messages to
fix before turning on debug level log messages on during unit tests, so
we can gate on issues like this.

Change-Id: I8a2b64222deaf5320bcc2e5215b6bd46565a505f