Set default for `want_ipv6`
Set default for `want_ipv6`

If the `want_ipv6` variable is not set on entry to `routed.cloud`, the
arithmetic evaluation will fail. This change introduces a default.

Signed-off-by: Nicolas Bock <4ad6fd604400c7892c7a2cb53bf674987bcaa405@suse.com>

gosipyan/automation,SUSE-Cloud/automation,aspiers/automation,gosipyan/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,aspiers/automation,aspiers/automation,aspiers/automation,gosipyan/automation,gosipyan/automation