When on MAAS support doing charm based configuration of OVS by
retrieving MAC address of ports attached to external network
from MAAS.
Note that we should extend the MAAS support to also work with
deployments where MAAS does the OVS configuration for us.
A recent change introduced a configuration option in the
./tests/test.yaml file (default location) which allows juju wait to be
used rather than waiting on various workload messages. This,
unfortunately, breaks mojo tests as they don't use a tests.yaml. This
change refactors that code, and enables a 'use_juju_wait' to be passed
into the relevant functions, and a new command line option (default
true) to disable using juju wait.
This is useful for validating deployments with OVN where it is not
required to have external networking attached to every chassis.
Any chassis that does not have external networking directly
attached will forward traffic destined for the external network
through a tunnel to a chassis that does.
Frode Nordahl
Alex Kavanagh
Aurelien Lourot
Chris MacNaughton