Force RQ_DASHBOARD_REDIS_URL to RQ_REDIS_URL

RQ_DASHBOARD_REDIS_URL can't be set to RD_REDIS_URL in setting.py.
If RQ_REDIS_URL is changed in settings.cfg, that wouldn't update
RQ_DASHBOARD_REDIS_URL.

JIRA INFRA-2754 #action In Progress

app/factory.py

@@ -107,6 +107,9 @@ def create_app(config=None):
     )
     app.logger.info(f"Settings:\n{settings_string}")
 
+    # Force RQ_DASHBOARD_REDIS_URL to RQ_REDIS_URL
+    app.config["RQ_DASHBOARD_REDIS_URL"] = app.config["RQ_REDIS_URL"]
+
     db.init_app(app)
     migrate.init_app(app)
     login_manager.init_app(app)

app/settings.py

@@ -33,7 +33,6 @@ SESSION_REDIS_URL = "redis://redis:6379/0"
 CACHE_TYPE = "redis"
 CACHE_REDIS_URL = "redis://redis:6379/1"
 RQ_REDIS_URL = "redis://redis:6379/2"
-RQ_DASHBOARD_REDIS_URL = RQ_REDIS_URL
 
 ELASTICSEARCH_URL = "http://elasticsearch:9200"
 ELASTICSEARCH_INDEX_SUFFIX = "-dev"