Non-serializable data

[ryanbrandenburg]

These warnings:

Microsoft.AspNetCore.SignalR.Client.FunctionalTests: Non-serializable data ('System.Object[]') found for 'Microsoft.AspNetCore.SignalR.Client.FunctionalTests.HubConnectionTests.CanInvokeClientMethodFromServer'; falling back to single test case.

are appearing in builds of SignalR, they sound like they're preventing the full compliment of tests from running.

CC @jkotalik

[jkotalik]

I don't think I'm the appropriate person for this task. cc @anurse @BrennanConroy @mikaelm12

[analogrelay]

These issues don't cause any problem running the test. They simply stop Test Explorer from showing them as multiple tests.

[analogrelay]

Re-opening to track making these data serializable so that we get a clean Test Explorer experience. It's suuuuuuper puntable :)