Not all contrib content is created equal, so let's just move scripts
to a properly named directory, in anticipation for different types of
content.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

This implements a "make selfcheck" that developers can use to run
the Avocado selftests in itself. It also keeps the old "make check"
(for a while) so that we can compare to the old approach if any
regressions occur in the near future.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

The unittest module, and unittest2 backport on Python 2.6, is capable of
finding unittests and running them. So, effectively, we do not need nose
at all.

This patch removes the dependency on nose, replacing the run script
with a version based solely on the unittest module.

One change of functionality is that run now looks and runs tests in the
standard selftests directories (unit, functional, doc), and does not
accept command line arguments. If one wants to run a subset of them,
it's pretty easy to just use the unittest module for that:

 $ python -m unittest discover -s selftests/unit
Signed-off-by: NCleber Rosa <crosa@redhat.com>

This check is being added to both to checkall and to travis.yaml,
s o that either in local and remote (CI) checks this can be quickly
flagged.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

Make sure the checkall and coverageall scripts return
failures.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

One convenient command to run the checks Travis runs on
the code base (less verbose version).
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>