pyroute2: REQUIRED_BONDINGS condition removed

netinfo.REQUIRED_BONDINGS condition removed from pyroute2 configurator as in
iproute2 (commit 341b6fb5a6487bd4d01e55fded2b8caad7d97035).

Change-Id: I025da6ba70bfd6a3b9abe8fee7976b8d5b4f7bd5
Signed-off-by: Petr Horáček <phoracek@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/30476
Reviewed-by: Antoni Segura Puimedon <asegurap@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>