Don't rely on crudini for octavia config

Relying on crudini being available on the overcloud nodes has turned out
to be relatively fragile. This changes octavia playbooks to use awk
instead of crudini to lookup a config item on the overcloud node.

Change-Id: I78d6d753df46c3964b9a4867eb93767230c4dae6
Closes-Bug: #1814320
(cherry picked from commit a2ad746d9d)

playbooks/roles/octavia-controller-post-config/tasks/main.yml

@@ -11,9 +11,9 @@
     become: true
     become_user: root
     shell: |
-      crudini --get "{{octavia_confd_prefix}}/etc/octavia/conf.d/octavia-worker/worker-post-deploy.conf" health_manager controller_ip_port_list
+        awk -F '=' -e '/^controller_ip_port_list/ { print $2; }' "{{octavia_confd_prefix}}/etc/octavia/conf.d/octavia-worker/worker-post-deploy.conf"
     register: config_contents
-    failed_when: config_contents.rc != 0 and 'Parameter not found' not in config_contents.stderr
+    failed_when: config_contents.rc != 0
     changed_when: false
     ignore_errors: true
   - name: retrieve current ip list