Description of problem:
when user exits from the interactive install in containerized OpenShift installation, the prompt message is not correct:
"Edit /var/lib/openshift-installer/installer.cfg with the desired values and run `atomic-openshift-installer --unattended install` to restart the install."
The file /var/lib/openshift-installer/installer.cfg is actually in the container not on the host.

Version-Release number of selected component (if applicable):
openshift3/installer v3.2.0.14

How reproducible:
100%

Steps to Reproduce:
1.docker run -ti -v ~/openshift/:/var/lib/openshift-installer/:Z -v ~/.ssh:/root/.ssh:Z openshift3/installer install
2.Press "n" when asked "Do the above facts look correct? [y/N]:"

Actual results:
Plese confirm that they are correct before moving forward.


10.66.x.x,192.168.0.254,10.66.x.x,test2.novalocal,test2.novalocal

Format:

connect_to,IP,public IP,hostname,public hostname

Notes:
 * The installation host is the hostname from the installer's perspective.
 * The IP of the host should be the internal IP of the instance.
 * The public IP should be the externally accessible IP associated with the instance
 * The hostname should resolve to the internal IP from the instances
   themselves.
 * The public hostname should resolve to the external ip from hosts outside of
   the cloud.

Do the above facts look correct? [y/N]: n

Edit /var/lib/openshift-installer/installer.cfg with the desired values and run `atomic-openshift-installer --unattended install` to restart the install.


Expected results:
The prompt message is correct to guide users to modify the configuration and restart the install. 

Additional info: