Add Random Forest support #1729
Description
To ease the transition from Azure ML Studio to ML.NET, please add an equivalent of https://docs.microsoft.com/en-us/azure/machine-learning/studio-module-reference/multiclass-decision-forest to ML.NET
To ease the transition from Azure ML Studio to ML.NET, please add an equivalent of https://docs.microsoft.com/en-us/azure/machine-learning/studio-module-reference/multiclass-decision-forest to ML.NET