Normalize tags in all places to prepare for tag fixing in future (#1739)

roles/bootstrap-os/tasks/bootstrap-coreos.yml

roles/bootstrap-os/tasks/bootstrap-ubuntu.yml

roles/dnsmasq/meta/main.yml

roles/dnsmasq/tasks/main.yml

roles/docker/tasks/main.yml

roles/download/tasks/main.yml

roles/etcd/meta/main.yml

roles/etcd/tasks/configure.yml

roles/etcd/tasks/gen_certs_script.yml

roles/etcd/tasks/gen_certs_vault.yml

roles/etcd/tasks/main.yml

roles/etcd/tasks/set_cluster_health.yml

roles/etcd/tasks/upd_ca_trust.yml

roles/kubernetes-apps/ansible/tasks/main.yml

roles/kubernetes-apps/ansible/tasks/netchecker.yml

roles/kubernetes-apps/meta/main.yml

roles/kubernetes-apps/network_plugin/meta/main.yml

...s/kubernetes-apps/policy_controller/calico/tasks/main.yml

roles/kubernetes-apps/policy_controller/meta/main.yml

roles/kubernetes/client/tasks/main.yml