Change the way to decide when the client socket is open

[Gsantomaggio]

When the tcp connection is forced the client sets the status as closed.

Fixes: #97

See the comment on #97 (comment) or the test CloseProducerConsumerAfterForceCloseShouldNotRaiseError to reproduce the error.

[Gsantomaggio]

@simone-fariselli you may be interested in this PR.

[codecov-commenter]

Codecov Report

Merging #98 (b501738) into main (5d44375) will increase coverage by 0.04%.
The diff coverage is 94.80%.

❗ Current head b501738 differs from pull request most recent head f63d30d. Consider uploading reports for the commit f63d30d to get more accurate results

@@            Coverage Diff             @@
##             main      #98      +/-   ##
==========================================
+ Coverage   91.39%   91.44%   +0.04%     
==========================================
  Files          69       69              
  Lines        4696     4743      +47     
  Branches      272      276       +4     
==========================================
+ Hits         4292     4337      +45     
- Misses        343      345       +2     
  Partials       61       61              

Impacted Files	Coverage Δ
Tests/Amqp10Tests.cs	100.00% <ø> (ø)
Tests/ClientTests.cs	97.29% <ø> (ø)
Tests/ConsumerSystemTests.cs	100.00% <ø> (ø)
Tests/PermissionTests.cs	100.00% <ø> (ø)
Tests/ProducerSystemTests.cs	99.42% <ø> (ø)
Tests/StreamSpecTests.cs	100.00% <ø> (ø)
Tests/UnitTests.cs	97.64% <ø> (ø)
Tests/Utils.cs	90.90% <85.00%> (-2.12%)	⬇️
RabbitMQ.Stream.Client/Client.cs	89.91% <96.29%> (+0.58%)	⬆️
RabbitMQ.Stream.Client/Connection.cs	93.51% <100.00%> (+0.31%)	⬆️
... and 5 more

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[lukebakken]

I'm investigating this failure:

[xUnit.net 00:01:02.85]         C:\Users\bakkenl\development\rabbitmq\rabbitmq-stream-dotnet-client\Tests\SystemTests.cs(213,0): at Tests.SystemTests.CloseProducerConsumerAfterForceCloseShouldNotRaiseError()
[xUnit.net 00:01:02.85]            at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__127_0(Object state)
  Failed Tests.SystemTests.CloseProducerConsumerAfterForceCloseShouldNotRaiseError [15 s]
  Error Message:
   System.TimeoutException : The operation has timed out.
  Stack Trace:
     at RabbitMQ.Stream.Client.ManualResetValueTaskSource`1.System.Threading.Tasks.Sources.IValueTaskSource<T>.GetResult(Int16 token) in C:\Users\bakkenl\development\rabbitmq\rabbitmq-stream-dotnet-client\RabbitMQ.Stream.Client\Client.cs:line 559
   at RabbitMQ.Stream.Client.Client.Request[TIn,TOut](Func`2 request, Nullable`1 timeout) in C:\Users\bakkenl\development\rabbitmq\rabbitmq-stream-dotnet-client\RabbitMQ.Stream.Client\Client.cs:line 291
   at RabbitMQ.Stream.Client.Client.Request[TIn,TOut](Func`2 request, Nullable`1 timeout) in C:\Users\bakkenl\development\rabbitmq\rabbitmq-stream-dotnet-client\RabbitMQ.Stream.Client\Client.cs:line 293
   at RabbitMQ.Stream.Client.Client.Unsubscribe(Byte subscriptionId) in C:\Users\bakkenl\development\rabbitmq\rabbitmq-stream-dotnet-client\RabbitMQ.Stream.Client\Client.cs:line 269
   at RabbitMQ.Stream.Client.Consumer.Close() in C:\Users\bakkenl\development\rabbitmq\rabbitmq-stream-dotnet-client\RabbitMQ.Stream.Client\Consumer.cs:line 127
   at Tests.SystemTests.CloseProducerConsumerAfterForceCloseShouldNotRaiseError() in C:\Users\bakkenl\development\rabbitmq\rabbitmq-stream-dotnet-client\Tests\SystemTests.cs:line 213
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__127_0(Object state)