Module 2 doc omits VSTS git repo setup step

[plzm]

The Module 2 doc shows a VSTS repo in the Data Integration app, and references functionality that's only available if a repo is configured, such as "Save" and "Publish".

I worked through the doc as is, as far as setting up an hourly trigger. I could not publish the pipeline, so I used "Publish All" at the top of the Data Integration app and got an error. At that point I realized there was a VSTS repo in the doc. I created a VSTS project and repo, then configured in the Data Integration app. While the integration runtime and pipeline JSON files got pushed to the repo, my pipeline disappeared from the Data Integration app (I recognize ADFv2 is still in preview, no worries and I will recreate).

For the sake of others working through Module 2, it would be good to add the step of configuring a repo earlier in the document.