Connection error in VS on vstest.console exit

[codito]

Description

TranslationLayer throws an error on the communication channel if vstest.console exits

Steps to reproduce

1. "Run All" from test explorer on a unit test project
2. Terminate the vstest.console.exe process
3. "Run All" on the same project

Expected behavior

Run All should work on step 3

Actual behavior

Following error is thrown:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.IO.IOException: Unable to write data to the transport connection: An established connection was aborted by the software in your host machine. ---> System.Net.Sockets.SocketException: An established connection was aborted by the software in your host machine
   at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size)
   --- End of inner exception stack trace ---
   at System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size)
   at System.IO.Stream.WriteByte(Byte value)
   at System.IO.BinaryWriter.Write(Byte value)
   at System.IO.BinaryWriter.Write7BitEncodedInt(Int32 value)
   at System.IO.BinaryWriter.Write(String value)
   at Microsoft.VisualStudio.TestPlatform.CommunicationUtilities.SocketCommunicationManager.WriteAndFlushToChannel(String rawMessage) in D:\dd\gh\Microsoft\vstest\src\Microsoft.TestPlatform.CommunicationUtilities\SocketCommunicationManager.cs:line 241
   at Microsoft.VisualStudio.TestPlatform.CommunicationUtilities.SocketCommunicationManager.SendMessage(String messageType, Object payload) in D:\dd\gh\Microsoft\vstest\src\Microsoft.TestPlatform.CommunicationUtilities\SocketCommunicationManager.cs:line 202
   at Microsoft.TestPlatform.VsTestConsole.TranslationLayer.VsTestConsoleRequestSender.DiscoverTests(IEnumerable`1 sources, String runSettings, ITestDiscoveryEventsHandler eventHandler) in D:\dd\gh\Microsoft\vstest\src\Microsoft.TestPlatform.VsTestConsole.TranslationLayer\VsTestConsoleRequestSender.cs:line 107
   at Microsoft.TestPlatform.VsTestConsole.TranslationLayer.VsTestConsoleWrapper.DiscoverTests(IEnumerable`1 sources, String discoverySettings, ITestDiscoveryEventsHandler discoveryEventsHandler) in D:\dd\gh\Microsoft\vstest\src\Microsoft.TestPlatform.VsTestConsole.TranslationLayer\VsTestConsoleWrapper.cs:line 104

Similar behaviour for Debug All Scenario is observed as well.

Environment

vstest.console from 576f536 bits.

[codito]

Translation layer also needs to clean up current session on communication failure.

[codito]

Fixed with 668257f