ethtool: remove debian and configure.ac python-ethtool references

Commit a5e6b0843b6193d578f59cfe40303eaadf1c02ce aimed to remove any
python-ethtool reference outside vdsm-bootstrap. Regrettably, I missed
these few places that I fix now.

Change-Id: Ie1430f9f947d57abbac2751126a63bf25092c7bc
Signed-off-by: Antoni S. Puimedon <asegurap@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/32803
Reviewed-by: Dan Kenigsberg <danken@redhat.com>