doesntwork:
  type: OS::Heat::ResourceGroup
  properties:
    count: 2
    type: 'http://someplace/something.yaml'
    properties:
      myjson:
        content:
          # this never happens
          get_file: 'http://place/where/i/get/this.sh'

alsodoesntwork:
  type: OS::Heat::SoftwareConfig
  properties:
    group: ungrouped
    config:
      str_replace:
        template:
          get_file: 'http://place/where/i/get/this.sh'
        params:
           this: that