Add options for SSL support either via files or FreeIPA

If ssl and freeipa are true then certificates are obtained using
certmonger.

If ssl is true and freeipa is false then the the mysql and qpid
certificates and keys need to be passed in as arguments.

Horizon is configured to use ssl on the public interface FQDN if
ssl is true.

Secure qpid and mysql with SSL for nova, keystone, glance, ceilometer,
cinder and heat.