Update the tutorial on how to use OpenStack and libvirt:
* Use Ubuntu 20.04 as the host and the 'lxd' snap
* Use the Ubuntu Cloud image (instead of Clear Cloud image)
* Delete a screenshot that wasn't in use
Tracked-On: #5564
Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
Update the OpenStack/libvirt tutorial with detailed instructions with
screen shots. Add patch file mention in the instructions to the docs
area so it's accessible.
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>