Fixes python version of MACDTrendAlgorithm
Fixes python version of MACDTrendAlgorithm

Fixes MACDTrendAlgorithm to match C# and pass regression tests.
In the C#, the MACD fast period was previously updated from 9 to 12. It lead to an update in regression tests.

jameschch/Lean,Jay-Jay-D/LeanSTP,jameschch/Lean,AlexCatarino/Lean,Jay-Jay-D/LeanSTP,StefanoRaggi/Lean,StefanoRaggi/Lean,kaffeebrauer/Lean,AnshulYADAV007/Lean,redmeros/Lean,andrewhart098/Lean,AnshulYADAV007/Lean,andrewhart098/Lean,kaffeebrauer/Lean,AnshulYADAV007/Lean,kaffeebrauer/Lean,QuantConnect/Lean,StefanoRaggi/Lean,JKarathiya/Lean,QuantConnect/Lean,StefanoRaggi/Lean,jameschch/Lean,StefanoRaggi/Lean,andrewhart098/Lean,jameschch/Lean,QuantConnect/Lean,Jay-Jay-D/LeanSTP,AnshulYADAV007/Lean,redmeros/Lean,andrewhart098/Lean,AnshulYADAV007/Lean,kaffeebrauer/Lean,Jay-Jay-D/LeanSTP,redmeros/Lean,redmeros/Lean,JKarathiya/Lean,Jay-Jay-D/LeanSTP,JKarathiya/Lean,kaffeebrauer/Lean,AlexCatarino/Lean,AlexCatarino/Lean,jameschch/Lean,JKarathiya/Lean,AlexCatarino/Lean,QuantConnect/Lean