Add test cases for null LastUpdateTime and LastFillTime MOO
Add test cases for null LastUpdateTime and LastFillTime MOO

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