- Currently the auxiliary etcd instances remove themselves
after a single non-genesis member joins the cluster. This
leaves the cluster susceptible to non-recoverable disruption
until a 3rd member joins. This change makes the auxiliary control
script wait for a configurable number of non-auxiliary members to
join before removing the auxiliary members.
Change-Id: Ib4968b533e8433e3c40a845d086c7078e807c3e2