Fix bug in ready node listener. Previously it was returning all nodes.
Fix bug in ready node listener. Previously it was returning all nodes.

mmerrill3/autoscaler,kubernetes/autoscaler,bskiba/autoscaler,kubernetes/autoscaler,kubernetes/autoscaler,bskiba/autoscaler,mmerrill3/autoscaler,mmerrill3/autoscaler,kubernetes/autoscaler,bskiba/autoscaler,mmerrill3/autoscaler