YAMLLint everything (#4576)

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

...kubernetes-apps/network_plugin/kube-router/tasks/main.yml

roles/network_plugin/cni/tasks/main.yml

tests/files/packet_centos-weave-kubeadm-sep.yml

tests/files/packet_centos7-calico-ha.yml

tests/files/packet_centos7-cilium.yml

tests/files/packet_centos7-flannel-addons.yml

tests/files/packet_centos7-kube-router.yml

tests/files/packet_centos7-multus-calico.yml

tests/files/packet_debian9-calico-upgrade.yml

tests/files/packet_opensuse-canal.yml

tests/files/packet_rhel7-canal-sep.yml

tests/files/packet_rhel7-cilium.yml

tests/files/packet_rhel7-weave.yml

tests/files/packet_ubuntu-canal-ha.yml

tests/files/packet_ubuntu-canal-kubeadm.yml

tests/files/packet_ubuntu-cilium-sep.yml

tests/files/packet_ubuntu-contiv-sep.yml

tests/files/packet_ubuntu-flannel-ha.yml

tests/files/packet_ubuntu-kube-router-sep.yml