add os_domain_name #335

[ioggstream]

Added support for v3 endpoint and os_domain_name in openstack configuration.

This works smoothly on my RHOSP9 + OCP 3.4

[markllama]

Is there a reference that shows that openshift-ansible will accept this new parameter?

[ioggstream]

@markllama I found the following. Let me know if it's ok or if I should reformat something.

Thx++Peace, R.

https://github.com/openshift/openshift-docs/blob/be87faceca521d52347d33e49b4ba6b6a2a1da26/install_config/configuring_openstack.adoc

Added in https://github.com/openshift/openshift-docs/pull/2967/files#diff-21f3ad43dcaf3f821f666e867bcf3221R63

[ioggstream]

Only set os_domain_name when using v2 now.

[tomassedovic]

Thanks!