Implement a callback plugin for human readable ansible logs
Implement a callback plugin for human readable ansible logs

This implements a callback plugin to make the ansible logs easier
to read. This is especially pertinent for the output of tasks
like shell commands and apt package actions.

It also disables the use of the verbose parameter for Ansible, as
this plugin outputs stdout/stderr anyway.

Change-Id: I56886ba1d7f99b861f625c68078583e82dae2988

cfarquhar/openstack-ansible,major/os-ansible-deployment,major/openstack-ansible,yanyao/newton,cfarquhar/openstack-ansible,yanyao/openstack-ansible,cloudnull/os-ansible-deployment,yanyao/openstack-ansible,BjoernT/os-ansible-deployment,os-cloud/os-ansible-deployment,cloudnull/os-ansible-deployment,stackforge/os-ansible-deployment,openstack/openstack-ansible,BjoernT/openstack-ansible,stackforge/os-ansible-deployment,weezer/openstack-ansible,open-switch/infra_openstack-ansible,git-harry/os-ansible-deployment,yanyao/newton,BjoernT/openstack-ansible,major/openstack-ansible,major/os-ansible-deployment,robb-romans/openstack-ansible,os-cloud/os-ansible-deployment,mrda/openstack-ansible,mancdaz/openstack-ansible,open-switch/infra_openstack-ansible,weezer/openstack-ansible,git-harry/os-ansible-deployment,open-switch/infra_openstack-ansible,openstack/openstack-ansible,mancdaz/openstack-ansible,mrda/openstack-ansible,robb-romans/openstack-ansible,Logan2211/openstack-ansible,BjoernT/os-ansible-deployment,mrda/openstack-ansible,Logan2211/openstack-ansible,bunchc/openstack-ansible,git-harry/os-ansible-deployment,bunchc/openstack-ansible,BjoernT/os-ansible-deployment