[2.3, UI] MAAS 'Containers' tab drops 'mac' address instead of hostname

[Andres Rodriguez]

In the machine details page 'Containers' tab, the container listing is showing incorrect information.

When you have a container with multiple interface, MAAS removes the mac address of the second interface instead of removing the hostname. As such, MAAS should not duplicate the hostname, but include all MAC addresses:

The currently shown:

machine1 <mac1> <ip1>
machine1 <ip2>

What MAAS should show:

machine1 <mac1> <ip1>
         <mac2> <ip2>
machine2 <mac3> <ip3>