virsh_shutdown: Adjust test to SKIP remote test

Following other tests (destroy, domid, reboot, setvcpus, undefine,
vncdisplay, dominfo, dommemstat, domstate) - adjust the defaults for
the local_ip to be "LOCAL.EXAMPLE.COM" and the remote_ip to be
"REMOTE.EXAMPLE.COM" in order to cause the test to be skipped if
the defaults weren't changed.