Create internal domain load balancer for CUPS

[ChrisMcGowan]

Create an internal ELB for a FQDN internal domain for CUPS services on the platform to limit traffic going out and back in through the front door and costing cycles

Notes

• Customer CUPS require FQDN and if the CUPS app is internal to cloud.gov it has to leave our NATS gateway and come back through the front door of Shield/WAF and using cycles
• An internal domain elb would allow that traffic to stay inside the VPC and educing cost and overhead on the main front ELB.

Acceptance Criteria

• Create internal elb
• Make it a module with a boolean on/off switch to enable by environment
• Create DNS records and wildcard for elb
• Create Let's Encrypt flow to manage new domain wildcard cert
• Enable shared internal domain to CF