Updated components to allow comparing metrics at the end of experiments

[lnncrs]

Module: Train a model with the Azure Machine Learning Designer

Lab/Demo: 05

Fixes # .

Changes proposed in this pull request:

• Updated the "train-decision-tree" and "train-logistic-regression" source code components to have the same set of metrics and images to allow for comparison of metrics at the end of the lesson on Azure AI
• Minor formatting and import tweaks for easier readability

[madiepev]

Thank you for your contribution. Your changes have been incorporated in another PR.