[StarCluster] Loadbalance and setup plugins

[David Erickson]

HI I am wondering how setup plugins work with load balancing?  For 
example the signature of the run method for a ClusterSetup based plugin 
looks like:

      def run(self, nodes, master, user, user_shell, volumes):

When loadbalance detects the need and adds a new node to a cluster, do 
all existing and the new node show up in the nodes argument above?  I 
want to ensure that I am not re-initializing anything on my existing nodes.

Thanks!
David