Description of problem:
Using OSP12 with a deployed, or deploying overcloud, shows warnings always for validations which are succeeding making the UI show a problem falsly

Version-Release number of selected component (if applicable):
openstack-tripleo-validations-7.4.2-1.el7ost.noarch

How reproducible:
100%

Steps to Reproduce:
1. Do OSP12 Deployment
2. Look at UI Validations Section
3. Validations show that "Check Availability of Current Repositories" and "
Check if ceph-ansible is installed on the undercloud" always who warning

Actual results:
Both show warnings which are easily ignored in the playbook for example:
"Warnings:

* Consider using yum module rather than running yum
Success! The validation passed for all hosts:
* localhost"

Expected results:
No warnings for validations which are passing


Additional info:
Specific files are
- /usr/share/openstack-tripleo-validations/validations/ceph-ansible-installed.yaml
- /usr/share/openstack-tripleo-validations/validations/check-repo-availability.yaml

my hacky fixes:
[stack@undercloud validations]$ sudo diff ceph-ansible-installed.yaml ceph-ansible-installed.yaml.orig
14,15d13
<     args:
<       warn: false

[stack@undercloud validations]$ sudo diff check-repo-availability.yaml check-repo-availability.yaml.orig
15,16d14
<     args:
<       warn: false