Remove duplicate Redis key prefix and refactor getWorkers()
Remove duplicate Redis key prefix and refactor getWorkers()

wa0x6e/ResqueBoard,kamisama/ResqueBoard,nosun/ResqueBoard,wa0x6e/ResqueBoard,fushanlang/ResqueBoard,kamisama/ResqueBoard,nosun/ResqueBoard,fushanlang/ResqueBoard,nosun/ResqueBoard