Implement tripleo-container-tag role

A new Ansible role to tag containers managed by Pacemaker.
This role will be consummed by services managed by Pacemaker.

Requirements
------------

It requires Docker or Podman on the host, depending which container CLI
is used.

Role variables
--------------

- container_image: -- Name of the container image to tag.
- container_image_latest: -- Name of the tag.
- container_cli: -- Name of the Container CLI tool (default to docker).

Example Playbook
----------------

Sample playbook to call the role:

  - name: Tag Pacemaker containers
    hosts: all
    roles:
      - tripleo-container-tag
    vars:
      container_image: haproxy
      container_image_latest: pcmklatest
      container_cli: docker

In THT, we'll consume this role for pacemaker-managed services, so we
can tag the images during the deployment, the updates and the upgrades
by using the same Ansible task.

Change-Id: I61039cdaa6798e8ae7c918f772d863dc1b67ae02

releasenotes/notes/tripleo-container-tag-ec42e64289cb17e2.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    A new Ansible role to tag containers managed by Pacemaker.
+    This role will be consummed by services managed by Pacemaker.

roles/tripleo-container-tag/README.md

@@ -0,0 +1,41 @@
+tripleo-container-tag
+=====================
+
+An Ansible role to tag Pacemaker-managed containers.
+
+Requirements
+------------
+
+It requires Docker or Podman on the host, depending which container CLI
+is used.
+
+Role variables
+--------------
+
+- container_image: -- Name of the container image to tag.
+- container_image_latest: -- Name of the tag.
+- container_cli: -- Name of the Container CLI tool (default to docker).
+
+Example Playbook
+----------------
+
+Sample playbook to call the role:
+
+  - name: Tag Pacemaker containers
+    hosts: all
+    roles:
+      - tripleo-container-tag
+    vars:
+      container_image: haproxy
+      container_image_latest: pcmklatest
+      container_cli: docker
+
+License
+-------
+
+Free software: Apache License (2.0)
+
+Author Information
+------------------
+
+OpenStack TripleO team

roles/tripleo-container-tag/defaults/main.yaml

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+---
+container_cli: docker

roles/tripleo-container-tag/tasks/main.yaml

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+---
+- name: Tag {{ container_image_latest }} to latest {{ container_image }} image
+  shell: "{{ container_cli }} tag {{container_image}} {{container_image_latest}}"