- During the genesis or join operation when /etc/hosts and
/etc/resolv.conf are controlled by Promeande, we need to
support including a domain name. This can be configured
by YAML definition or by the join-script API. To support
backward compatability use a default of 'local' when no
domain is specified.
Testing: `./tools/gate.sh resiliency` has passed locally
Change-Id: Ia0d300912d3ec25eb7f1cb9c580eaa40b5b4addb