pep8: fix pep8 1.5.4/1.5.5

pep8 1.5.4/1.5.5 is even more strict than pep8 1.5.1.
This patch fixes all he warnings found by pep8 1.5.5.

Change-Id: I34a389df601f24292cd96f48dd8640408ea1da66
Signed-off-by: Francesco Romani <fromani@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/26764
Reviewed-by: Dan Kenigsberg <danken@redhat.com>