Enable os_tempest in quickstart-extras-validate playbook

This is needed so os-tempest can also be used in addition to
validate-tempest role to run tempest when quickstart-extras-validate
playbook is used.

Also let's ensure virtualenv package is installed
when using os-tempest  it can be absent when.

Change-Id: I44ab4eff686100966012118ccd9ac016d6c2ee54

playbooks/quickstart-extras-validate.yml

@@ -17,7 +17,7 @@
   roles:
     - {role: validate-simple, when: test_ping|bool}
 
-# Execute tempest against the overcloud deployment
+# Execute tempest using validate-tempest against the overcloud deployment
 - name: Execute tempest against the overcloud
   hosts: undercloud
   tags:
@@ -26,6 +26,21 @@
   roles:
     - {role: validate-tempest, when: tempest_config|bool or run_tempest|bool}
 
+# Execute tempest using os_tempest against the overcloud deployment
+- name: Validate the deployment
+  hosts: undercloud
+  tasks:
+    - include_tasks: tempest.yml
+      vars:
+        tempest_install_method: distro
+        tempest_cloud_name: 'overcloud'
+      when:
+        - not run_tempest|bool
+        - use_os_tempest is defined
+        - use_os_tempest|bool
+  tags:
+    - overcloud-validate
+
 # Ensure services and containers are OK
 - name: Execute simple service and container validations
   hosts:

playbooks/tempest.yml

@@ -91,6 +91,30 @@
     tempest_test_blacklist: "{{ known_failures | json_query('[?undercloud != `true`]') }}"
   when: tempest_cloud_name != 'undercloud'
 
+- name: set python_cmd
+  set_fact:
+    python_cmd: "python{{ ansible_python.version.major }}"
+    cacheable: true
+  when: python_cmd is not defined
+
+- name: Check if virtualenv is in the system
+  command: "{{ python_cmd }} -m virtualenv --version"
+  register: virtualenv_exist
+  failed_when: false
+  changed_when: false
+
+- when: virtualenv_exist.rc != 0
+  name: Install virtualenv
+  become: true
+  package:
+    state: present
+    name: >
+        {% if ansible_python.version.major == 3 %}
+        python3-virtualenv
+        {% else %}
+        python-virtualenv
+        {% endif %}
+
 - name: Run os_tempest role
   vars:
     ansible_become: true