Add worker integration test.
Add worker integration test.

custora/qless,Shopify/qless,custora/qless,Shopify/qless,Shopify/qless,custora/qless,custora/qless,backupify/qless,seomoz/qless,Shopify/qless,backupify/qless,backupify/qless,seomoz/qless,seomoz/qless,backupify/qless,seomoz/qless