Improve socket handling

[Gsantomaggio]

• Improve socket handling by using the native API socket.Connected instead of a local variable to check if the connection is still open or not
• Handle the close workflow in a better way
• Add

  reader = PipeReader.Create(stream, new StreamPipeReaderOptions(leaveOpen: true));
  writer = PipeWriter.Create(stream, new StreamPipeWriterOptions(leaveOpen: true));

• Add a try catch block to the message handler; in case it fails for any reason, it will be logged.
• Remove one test. There was a bug, and it was not deterministic. (Many other tests cover the same functions )

[Gsantomaggio]

@jonnepmyra, do you have a chance to test it?

[jonnepmyra]

@jonnepmyra, do you have a chance to test it?

Yes, but won't be able to test until Thursday next week 😔