test: use yaml stdout callback

This provides a much more readable output for tasks. It'll be easier to
debug traces.

Signed-off-by: Sébastien Han <seb@redhat.com>

ansible.cfg

@@ -9,7 +9,7 @@ roles_path = ./roles
 # Be sure the user running Ansible has permissions on the logfile
 log_path = /var/log/ansible.log
 
-forks = 20 
+forks = 20
 host_key_checking = False
 gathering = smart
 fact_caching = jsonfile
@@ -17,6 +17,7 @@ fact_caching_connection = $HOME/ansible/facts
 fact_caching_timeout = 600
 nocows = 1
 callback_whitelist = profile_tasks
+stdout_callback = yaml
 
 # Disable them in the context of https://review.openstack.org/#/c/469644
 retry_files_enabled = False
@@ -30,7 +31,7 @@ timeout = 60
 # see: https://github.com/ansible/ansible/issues/11536
 control_path = %(directory)s/%%h-%%r-%%p
 ssh_args = -o ControlMaster=auto -o ControlPersist=600s
-pipelining = True 
+pipelining = True
 
 # Option to retry failed ssh executions if the failure is encountered in ssh itself
 retries = 10

tox.ini

@@ -19,8 +19,8 @@ setenv=
   ANSIBLE_ACTION_PLUGINS = {toxinidir}/plugins/actions
   ANSIBLE_CALLBACK_PLUGINS = {toxinidir}/plugins/callback
   ANSIBLE_CALLBACK_WHITELIST = profile_tasks
-  # only available for ansible >= 2.2
-  ANSIBLE_STDOUT_CALLBACK = debug
+  # only available for ansible >= 2.5
+  ANSIBLE_STDOUT_CALLBACK = yaml
 deps= -r{toxinidir}/tests/requirements.txt
 changedir={toxinidir}/tests/functional/centos/7/infra_lv_create
 commands=
@@ -203,8 +203,8 @@ setenv=
   ANSIBLE_ACTION_PLUGINS = {toxinidir}/plugins/actions
   ANSIBLE_CALLBACK_PLUGINS = {toxinidir}/plugins/callback
   ANSIBLE_CALLBACK_WHITELIST = profile_tasks
-  # only available for ansible >= 2.2
-  ANSIBLE_STDOUT_CALLBACK = debug
+  # only available for ansible >= 2.5
+  ANSIBLE_STDOUT_CALLBACK = yaml
   ansible2.2: DELEGATE_FACTS_HOST = False
   docker_cluster: PLAYBOOK = site-docker.yml.sample
   docker_cluster_collocation: PLAYBOOK = site-docker.yml.sample