This patch brings the VM up to Ubuntu 18.04 LTS (bionic). Package list
upgraded to reflect changes between 16.04 and 18.04.
Known problems:
- After devstack installation, booted cirros system doesn't have proper
name resolution. Editing /etc/resolv.conf solves the problem
Change-Id: I28a3cbf6902e18b8956e9060f1d3ef0e38bdb387
c9099a54fd