Openshift 4.2 installation on AWS on Private VPC: Failed to generate asset “DNS Config”: getting public zone for “x.com”: No public route53 zone found matching name “x.com”

Issue

• The fact that the installation is done within a private VPC, expects that a public Route53 shouldn't be required from customer point of view, as private zone should be sufficient, however official installer needs to have a public domain, public ELB and public subnets on Route53. The installer keeps being improved after
• The default ingress can be made internal with a Day-2 modification.
• Openshift Container Platform 4.3 allows the deployment on existing private VPC as per documentation