das.defaultfailoverhost:
If this is set, VMware HA will first try to fail over hosts to the host
specified by this option. This is useful if you want to utilize one
host as a spare failover host, but is not usually recommended,
because VMware HA tries to utilize all available spare capacity
among all hosts in the cluster.
If the specified host does not have enough spare capacity,
VMware HA tries to fail over the virtual machine to any other
host in the cluster that has enough capacity.
