TcpReceiveSendGetsCanceledByDispose failing in CI

[JeremyKuhne]

https://mc.dot.net/#/user/dotnet-bot/pr~2Fdotnet~2Fcorefx~2Frefs~2Fpull~2F38527~2Fmerge/test~2Ffunctional~2Fcli~2Finnerloop~2F/20190621.24/workItem/System.Net.Sockets.Tests/analysis/xunit/System.Net.Sockets.Tests.SendReceiveMemoryNativeTask~2FTcpReceiveSendGetsCanceledByDispose(receiveOrSend:%20False)

Test was just added in: dotnet/corefx#37486

Ubuntu.1604.Amd64.Open-x64-Debug
Get Repro environment
Unhandled Exception of Type Xunit.Sdk.EqualException
Message :
Assert.Equal() Failure
Expected: OperationAborted
Actual:   ConnectionReset
Stack Trace :
   at System.Net.Sockets.Tests.SendReceive`1.TcpReceiveSendGetsCanceledByDispose(Boolean receiveOrSend) in /_/src/System.Net.Sockets/tests/FunctionalTests/SendReceive.cs:line 1121
--- End of stack trace from previous location where exception was thrown ---

[davidsh]

We are in the process of reverting PR dotnet/corefx#37486 due to unanticipated changes to Socket async I/O behaviors.

[davidsh]

We reverted PR dotnet/corefx#37486 with PR dotnet/corefx#38764. So, I'm going to close this since the problem should go away now.