Better fix for different CoreOS os family facts

roles/docker/handlers/main.yml

roles/docker/tasks/main.yml

roles/docker/tasks/systemd.yml

roles/download/tasks/main.yml

roles/etcd/meta/main.yml

roles/etcd/tasks/gen_certs.yml

roles/kubernetes/preinstall/handlers/main.yml

roles/kubernetes/preinstall/tasks/main.yml

roles/kubernetes/preinstall/tasks/resolvconf.yml

roles/kubernetes/preinstall/tasks/set_resolv_facts.yml

roles/kubernetes/secrets/tasks/gen_certs.yml

roles/network_plugin/calico/rr/meta/main.yml

roles/network_plugin/flannel/handlers/main.yml

.../network_plugin/flannel/templates/flannel-options.conf.j2

tests/testcases/020_check-create-pod.yml

tests/testcases/030_check-network.yml

tests/testcases/040_check-network-adv.yml