Created "nodes" list of cluster obj at spawn start
Created "nodes" list of cluster obj at spawn start

This allows for deletion of security groups and keypairs if the
request was terminated before instance spawn.

Signed-off-by: Shashank Sahni <48273395e0436587f8f1beebda52d256c947abb2@gmail.com>

siel-iiith/MultiStack,siel-iiith/MultiStack