Managed TestCase Properties implemented

[Haplois]

Description

Implemented https://github.com/microsoft/vstest-docs/blob/master/RFCs/0017-Managed-TestCase-Properties.md

[peterwald]

In general this looks good to me. A couple of overall comments in addition to the inline ones....

1. I don't know enough about the TestCase property serialization to know how these changes will interact with forward and backward version mismatches. I think it would be prudent to give this some more thought and testing.
2. Now that the spec has evolved a bit I wonder if we should consider changing the nomenclature slightly. Since FullyQualifiedNameUtilities is really about removing the reliance on FullyQualifiedName (rather than assisting with it), maybe we should consider renaming it to something along the lines of ManagedQualifiedNameUtilities or ManagedNameUtilities or some such. This may reduce some potential confusion given that these changes really have nothing to do with the existing FullyQualifiedName property.

[ghost]

Hello @Haplois!

Because this pull request has the auto-merge label, I will be glad to assist with helping to merge this pull request once all check-in policies pass.

p.s. you can customize the way I help with merging this pull request, such as holding this pull request until a specific person approves. Simply @mention me (@msftbot) and give me an instruction to get started! Learn more here.

[nohwnd]

Looks good :)