Updated openstack/openstack
Project: openstack/swift  c2744caac43586b745c43c37a9c31483f7a126fc
null
Fix deprecation warning

Accessing BaseException.message spews a warning; we can get the same
information with str(err), which does not spew.

Change-Id: I67648d53d25522be074a78c44b3ce97dc27d1f07