Enable TLS in loadbalancer if cert path is detected

Enable TLS in loadbalancer if cert path is detected

If there is a value for the certificate path (which should only happen
if the environment for enabling TLS is used) then the loadbalancer will
detect it and configure it's front ends correctly. On the other hand
a proper override for the example environment was given, since this
will be needed because we want to pass the hosts and protocols
correctly so the tripleoclient will catch it and pass it to
os-cloud-config

Change-Id: Ifba51495f0c99398291cfd29d10c04ec33b8fc34
Depends-On: Ie2428093b270ab8bc19fcb2130bb16a41ca0ce09