Description of problem:
FFU: upgrade CLI exits with return code 1 even though the ansible playbook completed successfully.

Version-Release number of selected component (if applicable):
python-tripleoclient-9.2.1-3.el7ost.noarch

How reproducible:
100%

Steps to Reproduce:
1. openstack overcloud upgrade run --nodes compute-0 --skip-tags validation; echo $?

Actual results:

 u'TASK [Install docker packages on upgrade if missing] ***************************',
 u'skipping: [192.168.24.13] => {"changed": false, "skip_reason": "Conditional result was False"}',
 u'',
 u'TASK [blank ipv6 rule before activating ipv6 firewall.] ************************',
 u'skipping: [192.168.24.13] => {"changed": false, "skip_reason": "Conditional result was False"}',
 u'']
'headers'
1

In ansible mistral log we can actually see that the playbook completed successfully:

[root@undercloud-0 v1]# tail -10 /tmp/ansible-mistral-action_DonWC/ansible.log
2018-04-27 20:42:57,728 p=27008 u=mistral |  TASK [Update all packages] *****************************************************
2018-04-27 20:42:57,750 p=27008 u=mistral |  skipping: [192.168.24.13] => {"changed": false, "skip_reason": "Conditional result was False"}
2018-04-27 20:42:57,763 p=27008 u=mistral |  TASK [include] *****************************************************************
2018-04-27 20:42:57,782 p=27008 u=mistral |  skipping: [192.168.24.13] => {"changed": false, "skip_reason": "Conditional result was False"}
2018-04-27 20:42:57,794 p=27008 u=mistral |  TASK [include] *****************************************************************
2018-04-27 20:42:57,818 p=27008 u=mistral |  skipping: [192.168.24.13] => {"changed": false, "skip_reason": "Conditional result was False"}
2018-04-27 20:42:57,831 p=27008 u=mistral |  TASK [include] *****************************************************************
2018-04-27 20:42:57,854 p=27008 u=mistral |  skipping: [192.168.24.13] => {"changed": false, "skip_reason": "Conditional result was False"}
2018-04-27 20:42:57,856 p=27008 u=mistral |  PLAY RECAP *********************************************************************
2018-04-27 20:42:57,856 p=27008 u=mistral |  192.168.24.13              : ok=73   changed=55   unreachable=0    failed=0   


Expected results:
The cli returns the correct code.

Additional info:
This is a major issue as it blocks automation.