Fix ansible syntax to avoid ansible warnings (#3499)

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

roles/download/tasks/main.yml

roles/kubernetes-apps/network_plugin/weave/tasks/main.yml

roles/kubernetes/secrets/tasks/gen_certs_script.yml

roles/reset/tasks/main.yml

tests/cloud_playbooks/create-do.yml

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