Add manifest for Octavia deployment
Add manifest for Octavia deployment

This is a prep work to enable Octavia in integration tests and
introduces the basic manifest to set up Octavia.

Change-Id: If7fc02d5f9db49e00b540825286431ef4cc972fc

openstack/puppet-openstack-integration,openstack/puppet-openstack-integration,openstack/puppet-openstack-integration