Sweep Range of L2RegularizerWeight in AveragedPerceptron

[justinormont]

Issue

• What did you do?
  AutoML macro sweep using the AveragedPerceptron learner

• What happened?
  Crashed due to the AutoML sweeper picking exactly 0.5 for L2RegularizerWeight.

Error:

  must be in range [0, 0.5)
  Parameter name: L2RegularizerWeight

The hyperparameter range need to be changed to exclude 0.5 from its range:

machinelearning/src/Microsoft.ML.StandardLearners/Standard/Online/AveragedLinear.cs

Line 39 in c023727

[TlcModule.SweepableFloatParam("L2RegularizerWeight", 0.0f, 0.5f)]