Minor tweaking to cluster update flow
Minor tweaking to cluster update flow

This tweak tried avoid using new temp variables for no good. It also
moves the intialization 'inputs' dict closer to where it is used.

Change-Id: I0ca5af71a1a5d8d44943de23532daebe3549cf44

stackforge/senlin,openstack/senlin,openstack/senlin,Alzon/senlin,tengqm/senlin-container,tengqm/senlin-container,stackforge/senlin,openstack/senlin,Alzon/senlin