Comment 2 for bug 1686271

Reviewed: https://review.openstack.org/459938
Committed: https://git.openstack.org/cgit/openstack/networking-midonet/commit/?id=ba48784f510afebb957c30ba6d7d898d4070b4a1
Submitter: Jenkins
Branch: master

commit ba48784f510afebb957c30ba6d7d898d4070b4a1
Author: YAMAMOTO Takashi <email address hidden>
Date: Wed Apr 26 13:11:12 2017 +0900

    Workaround iptables issue in VM images for gate

    The infra team recently changed how the rules are applied.
    Unfortunately the new configuration seems broken and failing to set up
    any chains. Our gate scripts assume the existance of those chains,
    and thus failing. For now, workaround the issue by ignoring
    failures of iptables command in those scripts.

    Related-Bug: #1686271
    Change-Id: I7b13fdb97f8175248bf5cb44c7b2e103ae3a39c0