Add "parameter_defaults" to the environment

This give the user a way to set defaults recursively down nested stacks
without having to create the parameter in every template (it's ignored
if the template does not have the parameter).

blueprint env-nested-usability
Change-Id: Ie6b4481417204a527d322fd532c341b9acbce473
2 files changed
tree: ababfb25b8309bd522fbef25ce72e288cc4e823a
  1. common/
  2. functional/
  3. scenario/