add kubecon failure talk to public presentations
add kubecon failure talk to public presentations

Signed-off-by: Louis Guitton <d677b2ca8fa6dadc200b812762dc6c953bbc8ede@gmail.com>

zalando-incubator/kubernetes-on-aws,zalando-incubator/kubernetes-on-aws,zalando-incubator/kubernetes-on-aws