Revision to TODO list
Revision to TODO list

This patch removes the TODO item about 'template_url' support, which has
been added in https://review.openstack.org/#/c/375952/. The patch also
adds two new TODO items about nova server operations. These new nova
server operations will be useful for long running VM cluster instances
and for load-balancing or HA.

Change-Id: I6e51d289176b647a4fedc5bbaf1e31f5efff6734

openstack/senlin,stackforge/senlin,stackforge/senlin,openstack/senlin,openstack/senlin