[common] Update container tests

Add an additional fail condition and make the fail_msg more verbose
Update the container tests to use elevated permissions

roles/common/tasks/container_test.yml

@@ -1,16 +1,24 @@
 ---
+  # The containers are run by root, so need to become true
 - name: Get container status
+  become: true
   ansible.builtin.shell:
     cmd: |
       podman ps -a --format "{{ '{{.Names}} {{.Status}}' }}" | grep {{ container_name }}
   changed_when: false
   register: container_status
 
+  # NOTE: leaving the existing fail message to get the status and see if it is okay
 - name: |
     TEST Verify {{ container_name }} container status
     {{ common_container_test_id }}
   ansible.builtin.assert:
     that:
+      - "container_status.stdout | length != 0"
       - "'unhealthy' not in container_status.stdout"
     success_msg: "Container '{{ container_name }}' is in 'healthy' status."
-    fail_msg: "Container '{{ container_name }}' is not in 'healthy' status. Current status: {{ container_status.stdout }}"
+    fail_msg: |
+      Container does not meet the required conditions:
+      {%- if container_status.stdout | length == 0 %}Container name did not match any existing containers;{% endif %}
+      {%- if "unhealthy" in container_status.stdout %}Container status is unhealthy;{% endif %}
+      Container '{{ container_name }}' is not in 'healthy' status. Current status: {{ container_status.stdout }}