Allow sleeps to occur during scripts

Most of the scripts which performed a login too
early have been fixed in:
I63e1699a4b70dde161c0430beaaa5ed0b44093cb

However other scripts auto-run, and still may unexpectedly report sleeps
on stderr.  Separate them from other stderr output,

Change-Id: I0c10a96e55dadfe84d824253f82a7593afb4cfd4
Merge "Allow sleeps to occur during scripts"