Updated openstack/openstack
Project: openstack/python-swiftclient  394cb57f630b3dfdc1d5b2e172ef0f1c16b8211f

Fix context sensitive help for info and tempurl

Make it so that swift <cmd> --help will print the info
subcommand help for info and tempurl just like all the
other subcommands.

Also add unit tests to verify subcommand help.

Change-Id: Id3666dcf72a9727fbfda2f74c23293ada1c53aa0