Add a Bionic Beaver nodeset

I'm switching tempest/dsvm jobs to run on
Ubuntu 18.04 LTS (Bionic Beaver) on openstack/manila,
and I believe this nodeset can be here
so other projects can use it too.

Change-Id: Ib8279cde3e14d5378f27254188ee14dbb0800428
Needed-By: https://review.openstack.org/#/c/604929/
1 file changed