For some reason this configuration was omitted or incomplete in these
jobs. Without this configuration, Kayobe development configuration adds
eth1 to the breth1 bridge if it exists, or leaves the bridge without a
port otherwise. This can lead to network connectivity issues, if the IP
address of eth1 becomes inaccessible when it is added to breth1.
This change fixes the issue by ensuring that the dummy1 interface
exists, and configuring the aio network to add it to breth1 as a port,
instead of eth1.
Change-Id: I47115e5d8d1fb448cb9e46dc43b56c64987e428b
0766df1673