Fixed the sample codes because it couldn't be compiled earlier.

[goh-chunlin]

Purpose

• AuthenticateTraining method should not need the parameter predictionKey;
• TrainProject method should return the project object;
• PublishIteration method requires iteration as its parameter;
• TestIteration method should have the parameter publishedModelName.

Does this introduce a breaking change?

[ ] Yes
[X] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[X] Code style update (formatting, local variables)
[X] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
dotnet run

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information