containerd: change default resolvconf_mode to host_resolvconf (#8247)

* containerd: change default resolvconf_mode to host_resolvconf

* Wait for kube-apiserver to come back after pod refresh

* Handle resolv.conf gracefully

* Retain currently configured DNS entries to ensure we don't break the resolvers

* Suse uses wickedd for network management so no dhcp hooks

* Molecule: increase ansible timeout

* CI: Increase ansible timeout to 120s for Packet jobs

tests/files/packet_ubuntu16-docker-weave-sep.yml

@@ -10,6 +10,7 @@ auto_renew_certificates: true
 # Docker specific settings:
 container_manager: docker
 etcd_deployment_type: docker
+resolvconf_mode: docker_dns
 
 # Ubuntu 16 - docker containerd package available stopped at 1.4.6
 docker_containerd_version: latest

tests/files/packet_ubuntu18-docker.yml

@@ -7,3 +7,4 @@ vm_memory: 1600Mi
 # Use docker
 container_manager: docker
 etcd_deployment_type: docker
+resolvconf_mode: docker_dns

tests/files/packet_ubuntu20-docker.yml

@@ -14,3 +14,4 @@ enable_nodelocaldns: False
 # Use docker
 container_manager: docker
 etcd_deployment_type: docker
+resolvconf_mode: docker_dns