Lists python packages from test-python environment

* Adds another tox feature to scripts/run-local-test in order to allow
  us to debug CI failures. Current implementation is totally opaque
  regarding what packages are installed.
* Assures we display packages on zuul too.
* Assures that we do run some jobs using pre.yml when we touch it, as
  previously only openstack-tox-linters was run

Change-Id: Iad8741ac09d8668f53b29e4965f8868ad55db017

scripts/run-local-test

@@ -70,6 +70,9 @@ if [ ! -f "${HOME}/test-python/bin/ansible" ]; then
     run_pip --force
 fi
 
+# Display list of installed packages with versions (debugging failures)
+"${HOME}/test-python/bin/pip" freeze
+
 # Run local test
 PS1="[\u@\h \W]\$" source "${HOME}/test-python/bin/activate"
 source "${PROJECT_DIR}/ansible-test-env.rc"

zuul.d/molecule.yaml

@@ -93,6 +93,7 @@
 - job:
     files:
     - ^tripleo_ansible/roles/test_deps/.*
+    - ^zuul.d/playbooks/pre.yml
     name: tripleo-ansible-centos-7-molecule-test_deps
     parent: tripleo-ansible-centos-7-base
     vars:
@@ -122,6 +123,7 @@
 - job:
     files:
     - ^tripleo_ansible/roles/tuned/.*
+    - ^zuul.d/playbooks/pre.yml
     name: tripleo-ansible-centos-7-molecule-tuned
     parent: tripleo-ansible-centos-7-base
     vars:
@@ -132,7 +134,7 @@
     - ^role-addition.yml
     - ^tox.ini
     - ^molecule-requirements.txt
-    - ^zuul.d/playbooks/*.yml
+    - ^zuul.d/playbooks/.*
     name: tripleo-ansible-centos-7-role-addition
     nodeset: centos-7
     parent: tox-molecule

zuul.d/playbooks/pre.yml

@@ -35,6 +35,12 @@
         requirements: "{{ tripleo_ansible_project_path }}/molecule-requirements.txt"
         virtualenv: "{{ ansible_user_dir }}/test-python"
         virtualenv_site_packages: true
+
+    - name: Display test-python virtualenv package versions
+      shell: |-
+        . {{ ansible_user_dir }}/test-python/bin/activate
+        pip freeze
+
     # NOTE(cloudnull): This is being done because docker is not supported on RHEL-8
     #                  and tests within this repo still require docker.
     - name: Manual install container.io