Remove image.http_image from playbook

* let's the tool handle it itself.
* generate-tempestconf-file role uses url_cirros_image
  in test-demo-user.yaml so it cannot be removed.

Change-Id: Iae526d807f7438148e39747634e1f190879fb4ce

roles/generate-tempestconf-file-cloud/README.rst

@@ -23,12 +23,6 @@ to the output after that.
 
       A path to the virtual environment of python-tempestconf tool.
 
-.. zuul:rolevar:: url_cirros_image
-   :type: string
-   :default: http://download.cirros-cloud.net/0.3.5/cirros-0.3.5-x86_64-disk.img
-
-   A URL address of the cirros image.
-
 .. zuul:rolevar:: tempestconf_src_relative_path
    :type: string
 

roles/generate-tempestconf-file-cloud/defaults/main.yaml

@@ -1,4 +1,3 @@
 cloud_user: "devstack"
 virtualenvs:
     tempestconf: "~/.virtualenvs/.tempestconf"
-url_cirros_image: "http://download.cirros-cloud.net/0.3.5/cirros-0.3.5-x86_64-disk.img"

roles/generate-tempestconf-file-cloud/tasks/main.yaml

@@ -37,7 +37,6 @@
           --os-cloud {{ cloud_user }} \
           auth.tempest_roles Member \
           service_available.swift False \
-          image.http_image {{ url_cirros_image }}
     args:
         chdir: "{{ tempestconf_src_relative_path }}"
         executable: /bin/bash

roles/generate-tempestconf-file/tasks/generate-tempestconf.sh.j2

@@ -19,4 +19,3 @@ identity.uri $OS_AUTH_URL \
 identity.admin_password $OS_PASSWORD \
 service_available.swift False \
 {{ aditional_tempestconf_params }} \
-image.http_image {{ url_cirros_image }}