Monitor whether ConfigureAwait(false) still problematic in specs

[idg10]

In corvus-dotnet/Corvus.Extensions#53 (review) @mwadams asked me to remove all ConfigureAwait(false) calls in specs. However, on further discussion, we now suspect this is no longer required. So we're going to try without it, and see how it goes. This work item is to keep track of the fact that we're monitoring this.