
When tls-proxy is enabled, devstack enables SSL for the core services (Cinder, Glance, Keystone, Nova, Neutron and Swift). This change ensures that the ca_file parameter is properly defined in clients_* section for these options, so that requests to these services pick up the CA certificate. Change-Id: Ib6278d95d1ce31dc86aa8784a621227e17dc0fe7