schema: verify line length to be shorter than 80


Change-Id: Ib2bdb45f80d9f57c5169b104a9b4e4ca1eef4258
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>
Reviewed-on: http://gerrit.ovirt.org/36126
Reviewed-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-by: Francesco Romani <fromani@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>