setup.py: adjust to new test data location

Signed-off-by: Cleber Rosa <crosa@redhat.com>
setup.py: install all in-tree tests and associated data files

Signed-off-by: Cleber Rosa <crosa@redhat.com>
avocado.spec: split in-tree sample tests into a subpackage

Signed-off-by: Cleber Rosa <crosa@redhat.com>
Merge pull request #122 from clebergnu/packaging_fixes

Packaging fixes