Improve both the '--user' and '--project' options to allow names as well
as UUIDs. There's no release note included since this entire command was
added in change I15b4a5aca8d0dee59dd293e7b1c7272cdfbeea20, which hasn't
been included in a release yet.
Change-Id: I7654f3ffc54d38d5cfb03d8d1b2f4dc4fb06fb3d
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>