Description of problem:

Installation fails on AWS because the installer manifests include an invalid ingresses.config.openshift.io/cluster manifest.

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

4.12.

How reproducible:

Seems to be a consistent failure.

Steps to Reproduce:

1. Install a cluster on AWS without specifying lbType in the install-config.

Actual results:

The cluster bootstrap fails with the following error message:

"cluster-ingress-02-config.yml": failed to create ingresses.v1.config.openshift.io/cluster -n : Ingress.config.openshift.io "cluster" is invalid: spec.loadBalancer.platform.aws.type: Required value
 

Expected results:

Cluster bootstrap should succeed.

Additional info:

https://github.com/openshift/installer/pull/6478 introduced the problematic logic that sets spec.loadBalancer.platform.aws without setting spec.loadBalancer.platform.aws.type.