Description of problem:

FFU: openstack overcloud upgrade run outputs to stdout content which is not human readable. To give a brief example the following tasks output a huge amount of data which should be stored on a persistent location instead of stdout output:

TASK [Upgrade Mysql database from the host] 
TASK [take new os-net-config parameters into account now] 
TASK [Update all packages] <= this one actually puts the entire output of yum update * in the Ansible task json output

Version-Release number of selected component (if applicable):
openstack-tripleo-heat-templates-8.0.2-4.el7ost.noarch

How reproducible:
100%

Steps to Reproduce:
1. Run upgrade commands.

Actual results:
A lot of information which is not human readable.

Expected results:

stdout should reflect information relevant and readable by the user and point to the error in case of failure. The verbose logging should be stored on a persistent location that can be used for later debug purposes.

Additional info:

I believe this applies to all ffu/upgrade/updates. I am attaching such example from running openstack overcloud upgrade run --roles Controller --skip-tags validation.