Enhancements and Basic OCP Support

[NormJohnIV]

1. Removed the need to set vdm: true when calling overlay_facts
2. Added new vdm helper add_if_exists that can add overlays if a defined file exists
3. Granted users more control over ordering their overlays via prefixing files with two digit number. The kustomization.yaml output has also been updated to display the priorites of all overlays and their source (either vdm or user)
   ex. 57-my-example-overlay.yaml
4. Add basic support for Openshift. This includes routes, tls, remove seccomp profile, and optionally SecurityContextConstraints with the dependent RBAC permissions.