Comment 3 for bug 1562383

Reviewed: https://review.openstack.org/298098
Committed: https://git.openstack.org/cgit/openstack/kolla/commit/?id=eb70a13ae4fe78cd91336936fd87b786bb69c48d
Submitter: Jenkins
Branch: stable/mitaka

commit eb70a13ae4fe78cd91336936fd87b786bb69c48d
Author: Steven Dake <email address hidden>
Date: Sat Mar 26 10:11:32 2016 -0700

    Fix gate to use world writeable docker socket

    A recent change related to sudo securepath broke how sudo -E
    works. Now the PATH is reset by sudo as set by tox. As a result
    we can no longer rely on sudo -E anywhere in our gating system
    relating to path inheritence from the parent shell.

    This patch uses a shell operation in the setup_nodes.yml code
    to chmod the docker socket to 666 so docker containers can build
    properly. Now docker operations don't return a permission denied
    and we no longer require the sudo -E operation in any of our tox
    scripts. This isn't a security vulnerability because our gate
    scripts are only meant to be run in OpenStack infrastructure.
    To make this more clear I recommend moving these shell scripts to
    tests/gate.

    Change-Id: I5b3d6e280e3c12a25defedb14b5589ba642043fa
    Closes-Bug: #1562383