ctrl + c doesn't stop test execution

[NTaylorMullen]

Description

Hitting ctrl + c once test execution has started doesn't stop the actual test execution.

Environment

dotnet --info:

.NET Command Line Tools (1.0.0-preview3-004056)

Product Information:
 Version:            1.0.0-preview3-004056
 Commit SHA-1 hash:  ccc4968bc3

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.14393
 OS Platform: Windows
 RID:         win10-x64

Microsoft.NET.Test.Sdk version tested:
15.0.0-preview-20161024-02

[TheRealPiotrP]

Ctrl+C works for other MSBuild-Invoked CLI verbs. I wonder, though, if we just don't see that the close message is not being sent to child processes because they, even the compiler, have very brief execution times. If this has been looked at and it seems like a CLI issue please feel free to move to that repo.

[codito]

Fixed with e3e442b.