requested changes: use MarketHoursDatabase.GetDatabaseSymbolKey
requested changes: use MarketHoursDatabase.GetDatabaseSymbolKey

StefanoRaggi/Lean,StefanoRaggi/Lean,JKarathiya/Lean,jameschch/Lean,jameschch/Lean,AlexCatarino/Lean,JKarathiya/Lean,AlexCatarino/Lean,QuantConnect/Lean,AlexCatarino/Lean,AlexCatarino/Lean,jameschch/Lean,jameschch/Lean,JKarathiya/Lean,StefanoRaggi/Lean,StefanoRaggi/Lean,StefanoRaggi/Lean,QuantConnect/Lean,JKarathiya/Lean,jameschch/Lean,QuantConnect/Lean,QuantConnect/Lean