test: declare unstable test as broken

Before making sure that provided fix [1] makes the test stable it will
be marked as broken.

[1] http://gerrit.ovirt.org/#/c/24624/


Change-Id: I0ef53ee34fdcc022c7f2984f4aad4b82ee06840a
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>
Reviewed-on: http://gerrit.ovirt.org/24645
Reviewed-by: Nir Soffer <nsoffer@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>