CloudKitty's v1 API has been deprecated for a while, but the CLI
continued to use that as a default, keeping v2 as optional. This patch
changes that behaviour, switching to use the more modern and currently
maintained v2 as default, while v1 is still available via the
--os-rating-api-version parameter.
Change-Id: I4ca8c4f69b022af53d9f7ec71f3a2efadfc9163e
Signed-off-by: Juan Larriba <jlarriba@redhat.com>
2d965f9459