Refresh credentials on node removal
Refresh credentials on node removal

Problem:
The same credential used to create a node is used to delete it so if a
cloud cred is updated or keys rotated nodes will leak

Solution:
Before doing an update or delete of a node rebuild the credentials using
the latest cloud cred referenced in the template

rancher/rancher,rancher/rancher,cjellick/rancher,cjellick/rancher,rancher/rancher,cjellick/rancher,rancherio/rancher,rancher/rancher,rancherio/rancher