setup.py: Install test modules and config file

Another step in making avocado to run system wide
(and provide distro packages).
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

setup.py

+import glob
 from distutils.core import setup
 
 import avocado.version
@@ -14,4 +15,7 @@ setup(name='avocado',
                 'avocado.linux',
                 'avocado.utils',
                 'avocado.plugins'],
+      data_files=[('/etc/avocado', ['etc/settings.ini']),
+                  ('/usr/share/avocado/tests/sleeptest', glob.glob('tests/sleeptest/*')),
+                  ('/usr/share/avocado/tests/failtest', glob.glob('tests/failtest/*'))],
       scripts=['scripts/avocado'])