Added python-tempestconf-tempest-devstack-admin/demo-py3

* It will test python3 python-tempestconf stuff on devstack.
* use tempestconf_pip_virtualenv_python var when py3 based job
  is invoked.

Change-Id: Ic8a4d146203595a4381f7ae12dc98333589acae6

.zuul.yaml

@@ -9,7 +9,9 @@
     check:
       jobs:
         - python-tempestconf-tempest-devstack-admin
+        - python-tempestconf-tempest-devstack-admin-py3
         - python-tempestconf-tempest-devstack-demo
+        - python-tempestconf-tempest-devstack-demo-py3
         - python-tempestconf-tempest-packstack-admin
         - python-tempestconf-tempest-packstack-demo
         - tripleo-ci-centos-7-scenario002-standalone
@@ -18,7 +20,9 @@
     gate:
       jobs:
         - python-tempestconf-tempest-devstack-admin
+        - python-tempestconf-tempest-devstack-admin-py3
         - python-tempestconf-tempest-devstack-demo
+        - python-tempestconf-tempest-devstack-demo-py3
         - python-tempestconf-tempest-packstack-admin
         - python-tempestconf-tempest-packstack-demo
         - tripleo-ci-centos-7-scenario002-standalone
@@ -125,3 +129,37 @@
       test_demo: true
       cloud_admin: packstack-admin
 
+- job:
+    name: python-tempestconf-tempest-devstack-admin-py3
+    parent: python-tempestconf-tempest-devstack-admin
+    description: |
+      Tempest job for python-tempestconf on a devstack environment with python3 enabled.
+    vars:
+      tempestconf_pip_virtualenv_python: "python3"
+      devstack_localrc:
+        USE_PYTHON3: true
+      devstack_services:
+        s-account: false
+        s-container: false
+        s-object: false
+        s-proxy: false
+        # without Swift, c-bak cannot run (in the Gate at least)
+        c-bak: false
+
+- job:
+    name: python-tempestconf-tempest-devstack-demo-py3
+    parent: python-tempestconf-tempest-devstack-demo
+    description: |
+      Tempest job for python-tempestconf on a devstack environment with python3 enabled
+      for demo users.
+    vars:
+      tempestconf_pip_virtualenv_python: "python3"
+      devstack_localrc:
+        USE_PYTHON3: true
+      devstack_services:
+        s-account: false
+        s-container: false
+        s-object: false
+        s-proxy: false
+        # without Swift, c-bak cannot run (in the Gate at least)
+        c-bak: false

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

@@ -2,6 +2,7 @@
   - name: Create python-tempestconf venv with latest pip, setuptools and pbr
     pip:
         virtualenv: "{{ virtualenvs.tempestconf }}"
+        virtualenv_python: "{{ tempestconf_pip_virtualenv_python|default(omit) }}"
         name: "{{ item }}"
         state: latest
     with_items:
@@ -22,6 +23,7 @@
         name: "."
         virtualenv: "{{ virtualenvs.tempestconf }}"
         chdir: "{{ tempestconf_src_relative_path }}"
+        virtualenv_python: "{{ tempestconf_pip_virtualenv_python|default(omit) }}"
 
   - name: Generate tempest configuration file
     shell: |

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

@@ -7,6 +7,7 @@
         virtualenv: "{{ virtualenvs.tempestconf }}"
         name: "{{ item }}"
         state: latest
+        virtualenv_python: "{{ tempestconf_pip_virtualenv_python|default(omit) }}"
     with_items:
         - pip
         - setuptools
@@ -25,6 +26,7 @@
         name: "."
         virtualenv: "{{ virtualenvs.tempestconf }}"
         chdir: "{{ tempestconf_src_relative_path }}"
+        virtualenv_python: "{{ tempestconf_pip_virtualenv_python|default(omit) }}"
 
   - name: "Cat keystonerc_ file (only in packstack case)"
     shell: |