Update certificates for LZ Firewall admin console

[sheaphillips]

Describe the issue Currently firewalls are using self-signer certificates for TLS termination. We should generate CA-signed certs for this use so we don't get browser certificate warnings.

Which Sprint Priority is this issue related to? The 'Milestone' should clearly list Sprint Priorities - which one is this issue related to?

Additional context

• It Is possible to use Load balancer for this
• May involve creating DNS

Definition of done

• No more security warnings when visiting the firewall GUI
• Has to be done before 16th April

[wrnu]

This may not be relevant once we move to the checkpoint firewalls

[mitovskaol]

Not relevant anymore