Adds basic suppot to spin up a SONiC VM instance as a switch to have
wired to the switch VM to enable command behavior verification.
Also fixes some related issues due to an earlier rebase need on
the switch test VMs where the interface name was changed and
ultimately a different field need to be extracted for the
later commands to execute properly in order to provide data
to later callers for actions such as creating ports in ironic.
Change-Id: Ie4a2ac4da08359d20b5aa35faf741c5307bef6e0
Julia Kreger
47e87d649e