Add profile_tasks and timer callbacks for ansible

These add extra datetime information to tasks, in an effort to help
profile ansible. More info at:

  https://docs.ansible.com/ansible/2.5/plugins/callback/profile_tasks.html
  https://docs.ansible.com/ansible/2.5/plugins/callback/timer.html

Change-Id: Iebd40bfe06484ec1c6f938570eb6cb60e532fb9f
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

playbooks/roles/install-ansible/files/ansible.cfg

@@ -3,6 +3,7 @@ inventory=/opt/system-config/inventory/openstack.yaml,/opt/system-config/invento
 library=/usr/share/ansible
 log_path=/var/log/ansible/ansible.log
 callback_plugins=/etc/ansible/callback_plugins
+callback_whitelist=profile_tasks, timer
 inventory_plugins=/etc/ansible/inventory_plugins
 roles_path=/opt/system-config/roles:/etc/ansible/roles
 retry_files_enabled=False
@@ -11,7 +12,6 @@ gathering=smart
 fact_caching=jsonfile
 fact_caching_connection=/var/cache/ansible/facts
 
-
 [inventory]
 enable_plugins=openstack,constructed,yaml,advanced_host_list,ini
 cache=True