Remove RabbitMQ ha-all policy when not required

With the addition of the variable
`om_enable_rabbitmq_high_availability`, this feature in the upgrade
task should be brought back. It is also now used in the deploy task. The
`ha-all` policy is cleared only when
`om_enable_rabbitmq_high_availability` is set to `false`.

Change-Id: Ia056aa40e996b1f0fed43c0f672466c7e4a2f547

ansible/roles/rabbitmq/tasks/deploy.yml

 ---
+- include_tasks: remove-ha-all-policy.yml
+  when:
+    - not om_enable_rabbitmq_high_availability | bool
+
 - import_tasks: config.yml
 
 - import_tasks: check-containers.yml

ansible/roles/rabbitmq/tasks/remove-ha-all-policy.yml

+---
+- block:
+    - name: Get container facts
+      become: true
+      kolla_container_facts:
+        container_engine: "{{ kolla_container_engine }}"
+        name:
+          - "{{ service.container_name }}"
+      register: container_facts
+
+    - block:
+        - name: List RabbitMQ policies
+          become: true
+          command: "docker exec {{ service.container_name }} rabbitmqctl list_policies --silent"
+          register: rabbitmq_policies
+          changed_when: false
+
+        - name: Remove ha-all policy from RabbitMQ
+          become: true
+          command: "docker exec {{ service.container_name }} rabbitmqctl clear_policy ha-all"
+          when:
+            - "'ha-all' in rabbitmq_policies.stdout"
+      when: container_facts[service.container_name] is defined
+
+  delegate_to: "{{ groups[role_rabbitmq_groups] | first }}"
+  run_once: true
+  vars:
+    service_name: "rabbitmq"
+    service: "{{ rabbitmq_services[service_name] }}"

ansible/roles/rabbitmq/tasks/upgrade.yml

 ---
+- include_tasks: remove-ha-all-policy.yml
+  when:
+    - not om_enable_rabbitmq_high_availability | bool
+
 - import_tasks: config.yml
 
 - import_tasks: feature-flags.yml

releasenotes/notes/rabbitmq-remove-ha-all-policy-when-not-required-81dcf64542c4805f.yaml

+---
+fixes:
+  - |
+    When upgrading or deploying RabbitMQ, the policy `ha-all` is cleared if
+    `om_enable_rabbitmq_high_availability` is set to `false`.