In Icehouse release, official API supported is v2 but Nova does not
support it at this time.

For now, we keep v1 endpoint for backward compatibility and let the
operator create a v2 endpoint.

Change-Id: I27264dff683c47560351235c8e398afe7c8df2f0
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>