add molecule testing against centos:7

molecule/default/molecule.yml

@@ -0,0 +1,45 @@
+---
+dependency:
+  name: galaxy
+driver:
+  name: docker
+
+lint: |
+  yamllint .
+  ansible-lint
+platforms:
+  - name: centos_7
+    image: centos:7
+    privileged: true
+    command: /usr/sbin/init
+    capabilities:
+      - SYS_ADMIN
+    tmpfs:
+      - /run
+      - /tmp
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup
+    env:
+      ANSIBLE_USER: ansible
+      SUDO_GROUP: wheel
+      DEPLOY_GROUP: deployer
+      container: docker
+provisioner:
+  name: ansible
+verifier:
+  name: ansible
+
+scenario:
+  name: default
+  test_sequence:
+    - lint
+    - destroy
+    # - dependency
+    - syntax
+    - create
+    # - prepare
+    - converge
+    - idempotence
+    # - side_effect
+    - verify
+    - destroy