Fix to check the result of undercloud_debug validation

undercloud_debug validation always fails because the playbook
doesn't check config_result correctly. The structure of
config_result is like as follows:

  "changed": false,
  "msg": "All items completed",
  "results": [
      {
          "ansible_loop_var": "item",
          "changed": false,
          "failed": false,
          "invocation": {
              "module_args": {
                  "default": null,
                  "ignore_missing_file": true,
                  "key": "debug",
                  "path": "/var/lib/config-data/puppet-generated/neutron/etc/neutron/neutron.conf",
                  "section": "DEFAULT"
              }
          },
          "item": "/var/lib/config-data/puppet-generated/neutron/etc/neutron/neutron.conf",
          "msg": "The key 'debug' under the section 'DEFAULT' in file /var/lib/config-data/puppet-generated/neutron/etc/neutron/neutron.conf has the value: 'True'",
          "value": "True"
      },
    ...

Fix the playbook to see confi_result structure correctly.

Change-Id: I8fb6167f62ae7252f6f57249a30b74f5679115d3

roles/undercloud_debug/molecule/default/converge.yml

@@ -35,12 +35,14 @@
       include_role:
         name: undercloud_debug
       vars:
-        debug_check: false
+        debug_check: true
 
     - name: Should fail due to bad value
       block:
         - include_role:
             name: undercloud_debug
+          vars:
+            debug_check: false
 
       rescue:
         - name: Clear host errors

roles/undercloud_debug/tasks/main.yml

@@ -1,5 +1,5 @@
 ---
-- name: Check the services for debug flag
+- name: Get the services for debug flag
   become: true
   validations_read_ini:
     path: "{{ item }}"
@@ -8,4 +8,10 @@
     ignore_missing_file: true
   register: config_result
   with_items: "{{ services_conf_files }}"
-  failed_when: "debug_check|bool == config_result.value|bool"
+
+- name: Check the services for debug flag
+  fail:
+    msg: >
+      debug_check is set to {{ debug_check }} and the result of
+      validation is {{ config_result.results[0].value }}
+  failed_when: "debug_check|bool != config_result.results[0].value|bool"