This is required because RAX have an odd /v2 that isn't listed in the
catalogue but actually exists (but isn't really full /v2/ support).
It became a problem when recent client versions dropped /v1 support,
so now we have to force them to v2 like this.
Depends-On: https://review.opendev.org/714624
Change-Id: I6f139d2b3036ef0ecaddf3a9a225faae3a2b0450
4178296b49