Autobahn test suite fix(#4302)

...ckets/test/AutobahnTestApp/Properties/launchSettings.json

...t/ConformanceTests/AutobahnTestApp/AutobahnTestApp.csproj

...bSockets/test/ConformanceTests/AutobahnTestApp/Program.cs

...ebSockets/test/ConformanceTests/AutobahnTestApp/README.md

...bSockets/test/ConformanceTests/AutobahnTestApp/Startup.cs

...nformanceTests/AutobahnTestApp/TestResources/testCert.pfx

...nformanceTests/AutobahnTestApp/TestResources/testCert.txt

...ormanceTests/AutobahnTestApp/scripts/RunAutobahnTests.ps1

...nformanceTests/AutobahnTestApp/scripts/autobahn.spec.json

src/Middleware/WebSockets/test/ConformanceTests/Helpers.cs

...s/Microsoft.AspNetCore.WebSockets.ConformanceTests.csproj