Update config.py
Update config.py

* update vars to match expected behavior that will be required in celery 6 (https://docs.celeryproject.org/en/v5.1.2/userguide/configuration.html#new-lowercase-settings)
* adding "redis_backend_health_check_interval" var to hopefully fix error 110 bug introduced in redis 3.2.0
*

texastribune/salesforce-stripe,texastribune/salesforce-stripe,texastribune/salesforce-stripe