Add SSL support for quantum [2/3]

In very much the same way that we added SSL support to keystone, here's support in quantum.

Note that OpenStack requires two patches for this to work:
- https://github.com/openstack/quantum/commit/a4faa98b99c9ab50e8fdb299cc3f404d8144b3a9
- https://github.com/openstack/horizon/commit/66b0f369a7454cf5bd84ede9deba3a80f81c9bc0

Crowbar-Pull-ID: d968381d56565a8275f9c8acdb174d117bc97dce

Crowbar-Release: pebbles