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/redhat.yml

@@ -0,0 +1,28 @@
+---
+
+containerd_versioned_pkg:
+  'latest': "{{ containerd_package }}"
+  '1.2.4': "{{ containerd_package }}-1.2.4-3.1.el7"
+  '1.2.5': "{{ containerd_package }}-1.2.5-3.1.el7"
+  '1.2.6': "{{ containerd_package }}-1.2.6-3.3.el7"
+  'stable': "{{ containerd_package }}-1.2.6-3.3.el7"
+  'edge': "{{ containerd_package }}-1.2.6-3.3.el7"
+
+containerd_package_info:
+  pkg_mgr: yum
+  pkgs:
+    - name: "{{ containerd_versioned_pkg[containerd_version | string] }}"
+
+containerd_pkgs:
+  - name: "{{ containerd_versioned_pkg[containerd_version | string] }}"
+    yum_conf: "{{ containerd_yum_conf }}"
+
+containerd_repo_key_info:
+  pkg_key: ''
+  repo_keys: []
+
+containerd_repo_info:
+  pkg_repo: ''
+  repos: []
+
+runc_binary: /bin/runc