Fetch internal certificates for HAProxy based on network

Fetch internal certificates for HAProxy based on network

The service profile in HAProxy has the capability of creating
certificates based on a map. The idea is to standardize this, as
some of those certificates should match certain networks the services
are listening on (with the exception of the external network which is
handled differently and the tenant network which doesn't need a
certificate). So, based on which network a certain service is
listening on, we fetch the appropriate certificate.

bp tls-via-certmonger

Change-Id: I89001ae32f46c9682aecc118753ef6cd647baa62