avocado.spec: Fix bogus date

Fixes a sloppy copy and paste I made in the spec file.

Signed-off-by: Lucas Menghel Rodrigues <lmr@redhat.com>
setup.py: Remove dependency in setuptools

setuptools is not a standard module and makes things
unpredictable and forces us to push MANIFEST.in to
include more files so the binary distributions get
filled appropriately. In a retrospect, it was a bad
idea. Let's revert it.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Merge pull request #282 from lmr/fix-rpmbuild

Fix rpmbuild