Add molecule tests to containerd role (#6037)

roles/container-engine/containerd/molecule/default/molecule.yml

@@ -0,0 +1,31 @@
+---
+driver:
+  name: vagrant
+  provider:
+    name: libvirt
+lint:
+  name: yamllint
+  options:
+    config-file: ../../../.yamllint
+platforms:
+  - name: ubuntu18
+    box: generic/ubuntu1804
+    cpus: 2
+    memory: 1024
+    groups:
+      - kube-master
+provisioner:
+  name: ansible
+  env:
+    ANSIBLE_ROLES_PATH: ../../../../
+  config_options:
+    defaults:
+      callback_whitelist: profile_tasks
+  lint:
+    name: ansible-lint
+    options:
+      c: ../../../.ansible-lint
+verifier:
+  name: testinfra
+  lint:
+    name: flake8