Add subject alternative name extension

What does this Merge Request do?

This change updates the make task to generate a self signed x509 certificate to use the subject alternative name extension to allow pinning to an IP address or custom DNS entry. This would allow developers to decide if they wish want to add an additional loopback address interface to their host systems or pin to an IP address.

Merge Request checklist

• Tests added for new functionality. If not, please raise Issue to follow-up.
• This change is backward compatible. If not, please include steps to communicate to our users.
• Documentation added/updated, if needed.
• gdk doctor test added, if needed.