Add ssl support to gearman / gearman_server

Enable SSL support for gearman. We also created an new SSLZuulBaseTest
class to provide a simple way to use SSL end to end where possible. A
future patch will enable support in zookeeper.

Change-Id: Ia8b89bab475d758cc6a021988f8d79ead8836a9d
Signed-off-by: Paul Belanger <pabelanger@redhat.com>
22 files changed