Allow Overridden CELERY_QUEUES

Use this mechanism to enable a specialized queue.

playbooks/roles/edxapp/defaults/main.yml

@@ -283,8 +283,6 @@ EDXAPP_TIME_ZONE: 'America/New_York'
 EDXAPP_LMS_DOC_LINK_BASE_URL: 'https://edx.readthedocs.io/projects/open-edx-learner-guide'
 EDXAPP_CMS_DOC_LINK_BASE_URL: 'https://edx.readthedocs.io/projects/open-edx-building-and-running-a-course'
 
-EDXAPP_RECALCULATE_GRADES_ROUTING_KEY: 'edx.lms.core.low'
-
 EDXAPP_TECH_SUPPORT_EMAIL: 'technical@example.com'
 EDXAPP_CONTACT_EMAIL: 'info@example.com'
 EDXAPP_BUGS_EMAIL: 'bugs@example.com'
@@ -499,6 +497,9 @@ EDXAPP_CELERY_WORKERS:
     concurrency: 1
     monitor: False
     max_tasks_per_child: 1
+EDXAPP_RECALCULATE_GRADES_ROUTING_KEY: 'edx.lms.core.default'
+EDXAPP_LMS_CELERY_QUEUES: "{{ edxapp_workers|selectattr('service_variant', 'equalto', 'lms')|map(attribute='queue')|map('regex_replace', '(.*)', 'edx.lms.core.\\\\1')|list }}"
+EDXAPP_CMS_CELERY_QUEUES: "{{ edxapp_workers|selectattr('service_variant', 'equalto', 'cms')|map(attribute='queue')|map('regex_replace', '(.*)', 'edx.cms.core.\\\\1')|list }}"
 
 EDXAPP_DEFAULT_CACHE_VERSION: "1"
 EDXAPP_OAUTH_ENFORCE_SECURE: True
@@ -1027,6 +1028,7 @@ lms_env_config:
   AUTH_DOCUMENTATION_URL: "{{ EDXAPP_AUTH_DOCUMENTATION_URL }}"
   DOC_LINK_BASE_URL: "{{ EDXAPP_LMS_DOC_LINK_BASE_URL }}"
   RECALCULATE_GRADES_ROUTING_KEY: "{{ EDXAPP_RECALCULATE_GRADES_ROUTING_KEY }}"
+  CELERY_QUEUES: "{{ EDXAPP_LMS_CELERY_QUEUES }}"
 
 cms_auth_config:
   <<: *edxapp_generic_auth
@@ -1057,6 +1059,7 @@ cms_env_config:
   SITE_NAME:  "{{ EDXAPP_CMS_SITE_NAME }}"
   GIT_REPO_EXPORT_DIR: "{{ EDXAPP_GIT_REPO_EXPORT_DIR }}"
   DOC_LINK_BASE_URL: "{{ EDXAPP_CMS_DOC_LINK_BASE_URL }}"
+  CELERY_QUEUES: "{{ EDXAPP_CMS_CELERY_QUEUES }}"
 
 # install dir for the edx-platform repo
 edxapp_code_dir: "{{ edxapp_app_dir }}/edx-platform"