Enable containerd to deploy vanilla containerd package (#4951)

* Enable containerd to deploy vanilla containerd package

Fixes kubeadm references to CRI socket for containerd
Fixes download role cache feature to work with containerd

Change-Id: I2ab8f0031107e2f0d1a85c39b4beb66f08509a01

* use containerd for flannel-addons job

Change-Id: Ied375c7d65e64a625ffbd995ff16f2374067dee6

* add containerd vars

Change-Id: Ib9a8a04e501c481a86235413cbec63f3672baf91

* fixup vars

Change-Id: Ibea64e4b18405a578b52a13da100384582aa24c2

* more fixes

* fix rh repo

Change-Id: I00575a77cfb7b81d6095db5d918a52023c8f13ba

* Adjust helm host install for containerd

roles/container-engine/containerd/vars/ubuntu-amd64.yml

@@ -0,0 +1,27 @@
+---
+
+containerd_versioned_pkg:
+  'latest': "{{ containerd_package }}"
+  '1.2.4': "{{ containerd_package }}=1.2.4-1"
+  'stable': "{{ containerd_package }}=1.2.4-1"
+  'edge': "{{ containerd_package }}=1.2.4-1"
+
+containerd_package_info:
+  pkg_mgr: apt
+  pkgs:
+    - name: "{{ containerd_versioned_pkg[containerd_version | string] }}"
+      force: true
+
+containerd_repo_key_info:
+  pkg_key: apt_key
+  url: '{{ containerd_ubuntu_repo_gpgkey }}'
+  repo_keys:
+    - '{{ containerd_ubuntu_repo_repokey }}'
+
+containerd_repo_info:
+  pkg_repo: apt_repository
+  repos:
+    - >
+       deb {{ containerd_ubuntu_repo_base_url }}
+       {{ ansible_distribution_release|lower }}
+       {{ containerd_ubuntu_repo_component }}