Add ENTERPRISE_REPORTING_SECRET to cms auth settings.

CHANGELOG.md

 - Role: edxapp
+  - Added `ENTERPRISE_REPORTING_SECRET` to CMS auth settings to allow edx-enterprise migrations to run.
+
+- Role: edxapp
   - Added `EDXAPP_FERNET_KEYS` to allow for use of django-fernet-keys in LMS.
   
 - Role: edxapp

playbooks/roles/edxapp/defaults/main.yml

@@ -1317,6 +1317,7 @@ cms_auth_config:
     ADDITIONAL_OPTIONS: "{{ EDXAPP_CONTENTSTORE_ADDITIONAL_OPTS }}"
     DOC_STORE_CONFIG: "{{ EDXAPP_CMS_DOC_STORE_CONFIG }}"
   DOC_STORE_CONFIG: "{{ EDXAPP_CMS_DOC_STORE_CONFIG }}"
+  ENTERPRISE_REPORTING_SECRET: "{{ EDXAPP_ENTERPRISE_REPORTING_SECRET }}"
   MODULESTORE:
     default:
         ENGINE: 'xmodule.modulestore.mixed.MixedModuleStore'