the change in CDN results in these tests failing, because the new CDN config does not support credentials in this way.
we believe that consumers do not use this feature, as we have not had any reports of this causing failures for consumers.
if we get reports that consumers cannot download dependencies from the CDN with credentials, and we deem this to be a necessary feature, we can update the CDN config and re-add these tests.
cc @robdimsdale