Description of problem:
The message 'NOTE: Add a total of 3 or more masters to perform an HA installation.' was print in the phase '*** Installation Summary***', which is useless information especially for all-in-one installation.


*** Installation Summary ***

Hosts:
- openshift-121.lab.eng.nay.redhat.com
  - OpenShift master
  - OpenShift node
  - Etcd (Embedded)
  - Storage

Total OpenShift masters: 1
Total OpenShift nodes: 1

NOTE: Add a total of 3 or more masters to perform an HA installation.

Gathering information from hosts...
Installed environment detected.
By default the installer only adds new nodes to an installed environment.
Do you want to (1) only add additional nodes or (2) reinstall the existing hosts potentially erasing any custom changes?: 2
openshift-121.lab.eng.nay.redhat.com is already an OpenShift master

Version-Release number of selected component (if applicable):
atomic-openshift-utils-3.3.37-1.git.0.10ff25b.el7.noarch

How reproducible:
always

Steps to Reproduce:
1. install all-in-one Env using atomic-openshift-installer
2. check the messages of Installation Summary.



Actual results:
A useless message 'NOTE: Add a total of 3 or more masters to perform an HA installation.' was print.

Expected results:


Additional info: