pep8: virt cleanups for pep8-1.5

virt is now pep8-1.5 clean

Change-Id: I2ffcb5c7601cad74741fce07301ddb458cd6679f
Signed-off-by: Francesco Romani <fromani@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/26347
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>