Comment 4 for bug 1891403

@juliank As I read autopkgtest package's changelog haveged used to be installed but it was dropped in 5.11.
I used haveged in local tests and it seems to fix the test as expected and I think the scalingstack install needs adjusting. I suspect there is enough entropy for most of the things, the glibc test just times out when it can't get enough randomness quickly.