Add edxapp configuration options for user retirement (#4429)

CHANGELOG.md

@@ -26,6 +26,10 @@
     to update databases while building images, where services are generally disabled).
 
 - Role: edxapp
+  - Added `EDXAPP_RETIRED_USERNAME_FMT`, `EDXAPP_RETIRED_EMAIL_FMT`, `EDXAPP_RETIRED_USER_SALTS`, and 
+  `EDXAPP_RETIREMENT_SERVICE_WORKER_USERNAME` to generic_env_config to allow user retirement to be configurable. 
+
+- Role: edxapp
   - Added `ENTERPRISE_REPORTING_SECRET` to CMS auth settings to allow edx-enterprise migrations to run.
 
 - Role: edxapp

playbooks/roles/edxapp/defaults/main.yml

@@ -721,6 +721,13 @@ EDXAPP_PROCTORING_BACKEND_PROVIDER:
   class: 'edx_proctoring.backends.null.NullBackendProvider'
   options: {}
 
+EDXAPP_RETIRED_USERNAME_FMT: "retired__user_{}"
+EDXAPP_RETIRED_EMAIL_FMT: "retired__user_{}@retired.invalid"
+EDXAPP_RETIRED_USER_SALTS:
+  - "OVERRIDE ME WITH A RANDOM VALUE"
+  - "ROTATE SALTS BY APPENDING NEW VALUES"
+EDXAPP_RETIREMENT_SERVICE_WORKER_USERNAME: "OVERRIDE THIS WITH A VALID LMS USERNAME"
+
 # Comprehensive Theming
 # Deprecated, maintained for backward compatibility
 EDXAPP_COMPREHENSIVE_THEME_DIR: ""
@@ -1231,6 +1238,11 @@ generic_env_config:  &edxapp_generic_env
   EXTRA_MIDDLEWARE_CLASSES: "{{ EDXAPP_EXTRA_MIDDLEWARE_CLASSES }}"
   MAINTENANCE_BANNER_TEXT: "{{ EDXAPP_MAINTENANCE_BANNER_TEXT }}"
 
+  RETIRED_USERNAME_FMT: "{{ EDXAPP_RETIRED_USERNAME_FMT }}"
+  RETIRED_EMAIL_FMT: "{{ EDXAPP_RETIRED_EMAIL_FMT }}"
+  RETIRED_USER_SALTS: "{{ EDXAPP_RETIRED_USER_SALTS }}"
+  RETIREMENT_SERVICE_WORKER_USERNAME: "{{ EDXAPP_RETIREMENT_SERVICE_WORKER_USERNAME }}"
+
 lms_auth_config:
   <<: *edxapp_generic_auth
   CONTENTSTORE: