Fix compiler and update Odata sample

[xavierjohn]

Fix compiler errors and update Odata sample

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Summary of the changes (Less than 80 chars)

Description

Updated the OData sample and fixed the compiler error

[commonsensesoftware]

Most of this looks fine with a couple of minor housekeeping changes and then it can be merged.

[commonsensesoftware]

I don't see how this file is necessary at all. The OpenAPI example supplants the need for it. While I'm not completely opposed to the idea, this file just feels one-off and out of sync with the other examples. I'm not convinced this is worth keeping - yet.

[xavierjohn]

Using .http file is the easiest way to make API calls and view the results.

[commonsensesoftware]

I disagree. Running the OpenAPI examples are. This is highly inconsistent. Why just this one? Are you going to go add these for all example projects?

[commonsensesoftware]

😆 You partially fixed the alignment. Now, .AddControllers and .AddOData should align to .AddServices

[commonsensesoftware]

This was a partially completed thought, but not a bad idea. Closing this out as it is superseded by #1163.