Remove ClusterNode model from client side
Remove ClusterNode model from client side

This resource was never used since the last revision to
cluster-node-list call. It is of no value now, thus should be deleted.

Change-Id: I9f4e0f4e1bfe712f6eaa9b0aa10d8fb139ad6b2f

openstack/python-senlinclient,openstack/python-senlinclient,stackforge/python-senlinclient,stackforge/python-senlinclient