pep8: hooks cleanups for pep-1.5.x

hooks/* is now pep8 1.5.x clean.

Change-Id: I18ed1b38dc3bff8b04e26a712f5968184d0391b0
Signed-off-by: Francesco Romani <fromani@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/26383
Reviewed-by: Antoni Segura Puimedon <asegurap@redhat.com>
Reviewed-by: Federico Simoncelli <fsimonce@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>