Simplify the number of variables necessary to "just" enable OpenStack
cloud provider. Also add the new options available in K8s 1.9.

OpenStack authentication does not support using a mix of DomainID and
DomainName, only one or the other should be used.

This is to help support escapes and special characters

- Enable Cinder API version for block storage
- Enable floating IP for LBaaS

Currently kubespray does not install kubernetes in a way that allows cinder volumes to be used. This commit provides the necessary cloud configuration file and configures kubelet and kube-apiserver to use it.