Open Stack

We are proposing to have an "answers file" for the tripleoclient so
that you don't have to have a ling line of

   openstack overcloud deploy --templates /home/stack/mytemplates
--environment superduper.yaml --environment loadsofstuff.yaml
--envirnoment custom.yaml

But instead can just do

   opennstack overcloud deploy --answers-file answers.yaml

And in that file have:

  templates: /home/stack/mytemplates
  environments:
    - superduper.yaml
    - loadsofstuff.yaml
    - custom.yaml

This way you wont mess up the command line or confuse multiple subtle
command-line variations from Bash history and deploy the wrong one
(Yeah, we did that on a deployment).

A change request exists: https://review.openstack.org/#/c/249222/

Feedback?

//Lennart