Make outward_rabbit pre-checks idempotent

Copy the patterns from the rabbit checks, skip some pre-checks when the
container has already been started. Without this change the pre-checks
fail when you re-run the deploy, i.e. the port is not free because
rabbit is already running on that port.

This bug was triggered because murano is enabled, and this change has
been added to add the extra rabbitmq instance by default:
d8fe3ea780

Closes-Bug: #1715135

Change-Id: I0eb8785e7cd4eadfa792ea14a27f54a891b2bf02

ansible/roles/rabbitmq/tasks/precheck.yml

@@ -3,6 +3,7 @@
   kolla_container_facts:
     name:
       - rabbitmq
+      - outward_rabbitmq
   register: container_facts
 
 - name: Checking free port for RabbitMQ
@@ -69,6 +70,7 @@
   when:
     - enable_outward_rabbitmq | bool
     - inventory_hostname in groups['outward-rabbitmq']
+    - container_facts['outward_rabbitmq'] is not defined
 
 - name: Checking free port for outward RabbitMQ Management
   wait_for:
@@ -79,6 +81,7 @@
   when:
     - enable_outward_rabbitmq | bool
     - inventory_hostname in groups['outward-rabbitmq']
+    - container_facts['outward_rabbitmq'] is not defined
 
 - name: Checking free port for outward RabbitMQ Cluster
   wait_for:
@@ -89,6 +92,7 @@
   when:
     - enable_outward_rabbitmq | bool
     - inventory_hostname in groups['outward-rabbitmq']
+    - container_facts['outward_rabbitmq'] is not defined
 
 - name: Checking free port for outward RabbitMQ EPMD
   wait_for:
@@ -99,6 +103,7 @@
   when:
     - enable_outward_rabbitmq | bool
     - inventory_hostname in groups['outward-rabbitmq']
+    - container_facts['outward_rabbitmq'] is not defined
 
 - name: Check if all outward rabbit hostnames are resolvable
   command: "getent ahostsv4 {{ hostvars[item]['ansible_hostname'] }}"