setup.py: Fix setup script

The tests dir layout has changed, update setup accordingly.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
avocado.version: Update to 0.10.0

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Merge pull request #132 from lmr/version-0.10

Version 0.10.0