pep8: lib cleanups for pep-1.5.x

lib/* is now pep8 1.5.x clean.

Change-Id: I145fb9520219678d24d17698af618b44071ecbf4
Signed-off-by: Francesco Romani <fromani@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/26425
Reviewed-by: Dan Kenigsberg <danken@redhat.com>