Edge module created from env vars

[drwill-ms]

We were too aggressive about deleting some "dead code" which turned out to be called by HttpClient. That caused an error:

Unhandled exception. System.AggregateException: One or more errors occurred. (This property is not implemented by this class.)
 ---> System.NotImplementedException: This property is not implemented by this class.
   at System.Net.EndPoint.get_AddressFamily()
   at System.Net.Sockets.Socket.ConnectAsync(SocketAsyncEventArgs e, Boolean userSocket, Boolean saeaCancelable)
   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ConnectAsync(Socket socket)
   at System.Net.Sockets.Socket.ConnectAsync(EndPoint remoteEP, CancellationToken cancellationToken)
   at System.Net.Sockets.Socket.ConnectAsync(EndPoint remoteEP)
   at System.Net.Sockets.SocketTaskExtensions.ConnectAsync(Socket socket, EndPoint remoteEP)
   at Microsoft.Azure.Devices.Client.HsmAuthentication.Transport.HttpUdsMessageHandler.GetConnectedSocketAsync()
   at Microsoft.Azure.Devices.Client.HsmAuthentication.Transport.HttpUdsMessageHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
   at Microsoft.Azure.Devices.Client.HsmAuthentication.GeneratedCode.HttpHsmClient.TrustBundleAsync(String apiVersion, CancellationToken cancellationToken)
   at Microsoft.Azure.Devices.Client.RetryHandler.RunWithRetryAsync[T](Func`1 taskFunc, Func`2 transientErrorCheck, CancellationToken cancellationToken)
   at Microsoft.Azure.Devices.Client.Edge.TrustBundleProvider.GetTrustBundleWithRetryAsync(HttpHsmClient hsmHttpClient, String apiVersion)
   at Microsoft.Azure.Devices.Client.Edge.TrustBundleProvider.GetTrustBundleAsync(Uri providerUri, String apiVersion)
   at Microsoft.Azure.Devices.Client.EdgeModuleClientHelper.CreateCertificateValidatorFromEnvironmentAsync(ITrustBundleProvider trustBundleProvider, IotHubClientOptions options)
   at Microsoft.Azure.Devices.Client.IotHubModuleClient.CreateFromEnvironmentAsync(IotHubClientOptions options)
   at FilterModule.Program.Init() in /app/Program.cs:line 52
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.Wait()
   at FilterModule.Program.Main(String[] args) in /app/Program.cs:line 22
Unhandled exception. System.AggregateException: One or more errors occurred. (This property is not implemented by this class.)
 ---> System.NotImplementedException: This property is not implemented by this class.
   at System.Net.EndPoint.get_AddressFamily()
   at System.Net.Sockets.Socket.ConnectAsync(SocketAsyncEventArgs e, Boolean userSocket, Boolean saeaCancelable)
   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ConnectAsync(Socket socket)
   at System.Net.Sockets.Socket.ConnectAsync(EndPoint remoteEP, CancellationToken cancellationToken)
   at System.Net.Sockets.Socket.ConnectAsync(EndPoint remoteEP)
   at System.Net.Sockets.SocketTaskExtensions.ConnectAsync(Socket socket, EndPoint remoteEP)
   at Microsoft.Azure.Devices.Client.HsmAuthentication.Transport.HttpUdsMessageHandler.GetConnectedSocketAsync()
   at Microsoft.Azure.Devices.Client.HsmAuthentication.Transport.HttpUdsMessageHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
   at Microsoft.Azure.Devices.Client.HsmAuthentication.GeneratedCode.HttpHsmClient.TrustBundleAsync(String apiVersion, CancellationToken cancellationToken)
   at Microsoft.Azure.Devices.Client.RetryHandler.RunWithRetryAsync[T](Func`1 taskFunc, Func`2 transientErrorCheck, CancellationToken cancellationToken)
   at Microsoft.Azure.Devices.Client.Edge.TrustBundleProvider.GetTrustBundleWithRetryAsync(HttpHsmClient hsmHttpClient, String apiVersion)
   at Microsoft.Azure.Devices.Client.Edge.TrustBundleProvider.GetTrustBundleAsync(Uri providerUri, String apiVersion)
   at Microsoft.Azure.Devices.Client.EdgeModuleClientHelper.CreateCertificateValidatorFromEnvironmentAsync(ITrustBundleProvider trustBundleProvider, IotHubClientOptions options)
   at Microsoft.Azure.Devices.Client.IotHubModuleClient.CreateFromEnvironmentAsync(IotHubClientOptions options)

Also, we updated the API version to latest, but that results in an error as well, so I reverted it back to a 2018 one for use by this HSM path only.

[drwill-ms]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).