Chromium Site Isolation - Legacy Binding Test failure

[amaitland]

Commit https://github.com/cefsharp/CefSharp/commit/221185bf28b8cd4654e6ab1eb59897d372bf41c0 enabled site isolation by default for master

Tests are passing with the exception of IntegrationTestFacts.LoadLegacyJavaScriptBindingQunitTestsSuccessfulCompletion. Same test passes when I run it through Visual Studio Test Explorer. A new issue should be created and debugged at some point to determine the cause and evaluate if it's fixable or if upstream changes are required.

Originally posted by @amaitland in https://github.com/cefsharp/CefSharp/issues/2967#issuecomment-948229141

[amaitland]

We should add a legacy binding test to the Net Core implementation and reorder so the netcore tests run first. See if the problem is anyway related to the WCF implementation or if it's simply a matter of the details passed in via CefBrowser are not propagating to the render processes reliably.

[amaitland]

Tests are failing consistently now when run via Appveyor.

Test will be skipped when run under AppVeyor.

[amaitland]

Possibly related https://bitbucket.org/chromiumembedded/cef/issues/3260/support-reconnect-of-mojo-frame-channel