SSL support for openstack services.

In this edition of changes-from-lifeless we automate Chris Jones'
stunnel configuration for the undercloud, permitting deployment of
overclouds with stunnel wrapped around most services. Due to
https://launchpad.net/bugs/1235555 we cannot wrap heat yet.

Change-Id: I23c8d7c7a292685b1c095e4c3ca19e561b55c38f
Merge "SSL support for openstack services."