Display debug messages after playbook run
Display debug messages after playbook run

This patch adds a callback handler for displaying debug messages at the end of
a playbook run. This is helpful in situations where a debug message might be
lost in the middle of the Ansible output while a playbook runs.

You can view the output from a small example playbook here:

  https://gist.github.com/major/9583c97e335262228c2a9ede50d86458

Change-Id: I962b586751069a16adb073d05b33d310e0afc5af

openstack/openstack-ansible-plugins,os-cloud/openstack-ansible-plugins,os-cloud/openstack-ansible-plugins,openstack/openstack-ansible-plugins