Include the URL of your launchpad blueprint:
The convergence design requires extra data to be stored with each Resource row in the database, in order to allow different versions of a resource to co-exist within the same stack.
Add the following extra fields to the Resource table:
(Note, the first two fields are currently known as requirers and requirements, respectively, in https://github.com/zaneb/heat-convergence-prototype/blob/resumable/converge/resource.py - but those are too confusing. Once we settle on names, we should update the simulator code as well.)