Generate junit.xml file for testinfra

And collect it on post, it is helpful to see the results.

Change-Id: I0dbecf57bf9182168eb6f99cdf88329fcdeb1bdc
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

.zuul.yaml

@@ -146,6 +146,7 @@
         ansible_python_interpreter: python2
     pre-run: playbooks/zuul/run-base-pre.yaml
     run: playbooks/zuul/run-base.yaml
+    post-run: playbooks/zuul/run-base-post.yaml
     files:
       - .zuul.yaml
       - playbooks/.*

playbooks/zuul/run-base-post.yaml

@@ -0,0 +1,14 @@
+- hosts: bridge.openstack.org
+  tasks:
+    - name: Register junit.xml file
+      stat:
+        path: "{{ zuul.project.src_dir }}/junit.xml"
+      register: _junit
+
+    - name: Collect testinfra logs
+      synchronize:
+        dest: "{{ zuul.executor.log_root }}"
+        mode: pull
+        src: "{{ zuul.project.src_dir }}/junit.xml"
+        verify_host: true
+      when: _junit.stat.exists|bool

tox.ini

@@ -32,7 +32,7 @@ deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -E -b html doc/source doc/build/html
 
 [testenv:testinfra]
-commands = py.test -n 5 --connection=ansible --ansible-inventory=/etc/ansible/hosts/inventory.yaml --hosts=all -v {posargs}
+commands = py.test -n 5 --junit-xml junit.xml --connection=ansible --ansible-inventory=/etc/ansible/hosts/inventory.yaml --hosts=all -v {posargs}
 
 [flake8]
 show-source = True