Description of problem:
When creating new certificates using satellite-installer and passing empty "state" parameter an Evaluation Error is shown

Version-Release number of selected component (if applicable):
-

How reproducible:
always

Steps to Reproduce:
a)
1. satellite-installer --certs-regenerate true --certs-update-all --certs-update-server --certs-update-server-ca --certs-org-unit "FooOrg" --certs-state ""
b)
1. edit /etc/foreman-installer/scenarios.d/satellite-answers.yaml and set certs -> state: ''
2. satellite-installer --certs-regenerate true --certs-update-all --certs-update-server --certs-update-server-ca

Actual results:
satellite-installer fails with following error
<timestamp> [ERROR ] [configure] Evaluation Error: Error while evaluating a Function Call, 'katello::build_dn' parameter 'options' index 3 index 1 expects a value of type Undef or String[1], got String (file: /usr/share/foreman-installer/modules/katello/manifests/application.pp, line: 40, column: 24) on node <node-fqdn>

Expected results:
Reasonable error should be shown.

Additional info:
After fix (if this gets fixed) the installer should never cause inconsistency between certificates and config files - 'hammer ping' should pass (see bug 1964037)