Check os-type and os-version for vps

Fixes: 8712
Signed-off-by: Warren Usui <warren.usui@inktank.com>
This log message, and the one above, will likely be confusing since no context is provided.

Maybe something like "Using default values for supported os_type/os_version"

Also, while you're at it, stick to single spaces after punctuation just for consistency please :)