Fix repo_build_venv_rebuild toggle effectiveness

The repo_build_venv_rebuild toggle is supposed to trigger
a rebuild of the venvs, but currently it does nothing.

This patch fixes that, making it possible to rebuild the
venvs without having to rebuild the wheels too.

Change-Id: I61db1f5555cba2c659ff09d8369ce3c31b011b5d

tasks/repo_build_prepare.yml

@@ -26,7 +26,8 @@
     - "(ansible_local is not defined) or
        ('openstack_ansible' not in ansible_local) or
        ('repo_build' not in ansible_local['openstack_ansible']) or
-       ('need_wheel_build' not in ansible_local['openstack_ansible']['repo_build'])"
+       ('need_wheel_build' not in ansible_local['openstack_ansible']['repo_build']) or
+       ('need_venv_build' not in ansible_local['openstack_ansible']['repo_build'])"
 
 - name: Create package directories
   file:
@@ -65,20 +66,29 @@
     dest: "{{ repo_build_release_path }}/requirements_constraints.txt"
   register: _wheel_build_constraints
 
-- name: Record whether a wheel/venv build is required
+- name: Record whether a wheel build is required
   ini_file:
     dest: "/etc/ansible/facts.d/openstack_ansible.fact"
     section: repo_build
-    option: "{{ item }}"
+    option: "need_wheel_build"
     value: True
-  with_items:
-    - "need_wheel_build"
-    - "need_venv_build"
   when:
     - (_wheel_build_requirements | changed) or
       (_wheel_build_constraints | changed) or
       (repo_build_wheel_rebuild | bool)
 
+- name: Record whether a venv build is required
+  ini_file:
+    dest: "/etc/ansible/facts.d/openstack_ansible.fact"
+    section: repo_build
+    option: "need_venv_build"
+    value: True
+  when:
+    - (_wheel_build_requirements | changed) or
+      (_wheel_build_constraints | changed) or
+      (repo_build_wheel_rebuild | bool) or
+      (repo_build_venv_rebuild | bool)
+
 - name: Install pip packages
   pip:
     name: "{{ repo_pip_packages }}"