Add "run tests" and "debug tests" code lens actions to test classes

[bittercoder]

Environment data

dotnet --info output:
.NET Command Line Tools (1.0.4)

Product Information:
Version: 1.0.4
Commit SHA-1 hash: af1e6684fd

Runtime Environment:
OS Name: ubuntu
OS Version: 17.04
OS Platform: Linux
RID: ubuntu.16.10-x64
Base Path: /usr/share/dotnet/sdk/1.0.4

VS Code version: 1.13.1

C# Extension version: 1.11.0

Production Suggest

It would be great if the dotnet testing code lens could include "run tests" and "debug tests" actions on the class if it contains 1 or more test methods, this workflow is really useful when TDD'ing.

[DustinCampbell]

Hi! This is a duplicate of #420.