kolla: create external network in post-deployment

Also added installation of cinder:
 - Enable cinder, LVM backend for cinder
 - Create loopback device for cinder

Set nova compute virt type to qemu as there are
some issues with functest. kvm VMs take a long
time to boot and functest times out.

installer-type: kolla
deploy-scenario: os-nosdn-nofeature

Change-Id: I50fa7af560a81b8fa4f046a78a1705e4a1e986fc
11 files changed