Make plan_name configurable for config_download_deploy

Currently this relies on the hard-coded defaults in
tripleo-ansible-inventory, which means --config-download will break
with any non-default --stack option.

A similar fix is required to tripleoclient to pass this value.

Change-Id: I31cf062b28429be41e266745ade93be1e6c51b0f

workbooks/deployment.yaml

@@ -267,6 +267,7 @@ workflows:
     input:
       - timeout: 240
       - queue_name: tripleo
+      - plan_name: overcloud
       - work_dir: /var/lib/mistral
 
     tags:
@@ -320,6 +321,7 @@ workflows:
         input:
           ansible_ssh_user: tripleo-admin
           work_dir: <% $.get('work_dir') %>/<% execution().id %>
+          plan_name: <% $.get('plan_name') %>
         publish:
           inventory: <% task().result %>
         on-success: send_msg_generate_inventory