* Update charms to MySQL8 and OVN
* Update series to Focal
* Update MAAS install to a snap
* Remove one swift-storage unit
(four was overkill)
* Update Horizon screenshot
* Include juju status checkpoints
* Update final juju status output
* Simplify MAAS node names
* Improve some wording
* Include OVN bug reference and workaround
I used all steps with two deployments and was
able to ssh to an instance. One required the
OVN workaround and the other did not.
Change-Id: I6d20d07bedc6614295d44f732adfd602390fefe1
38280cd969