This is a set of utility APIs that Avocado provides as added value to
test writers.

It's suppose to be generic, without any knowledge of Avocado and reusable
in different projects.

.. note:: In the current version there is a hidden knowledge of avocado
   logging streams. More about this issue can be found here
   https://trello.com/c/4QyUgWsW/720-get-rid-of-avocado-test-loggers-from-avocado-utils
