Comment 6 for bug 1471049

Reviewed: https://review.openstack.org/397372
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=ed91915a4e217e519eeb2c0e3de14e9e73c3b002
Submitter: Jenkins
Branch: stable/newton

commit ed91915a4e217e519eeb2c0e3de14e9e73c3b002
Author: Sean McGinnis <email address hidden>
Date: Fri Nov 11 13:19:07 2016 -0600

    Set EVENTLET_NO_GREENDNS for IPv6 and dnspython compat

    If dnspython is present it causes socket.getaddrinfo() to be
    monkeypatched wiht code that does not work with IPv6. To get
    around this, the EVENTLET_NO_GREENDNS environment variable
    must be set before importing eventlet.

    This is resolved in the eventlet upstream code [1], but has not
    yet been released. Once our requirements have been raised past
    the 0.19.0 release with a version that includes this change we
    can remove this workaround.

    [1] https://github.com/eventlet/eventlet/commit/52b09becacd23f384cf69ae37d70c893c43e3b13

    Change-Id: Id9fe265d67f6e9ea5090bebcacae4a7a9150c5c2
    Closes-bug: #1471049
    (cherry picked from commit 4f31fb7962a241c13251994c8659595fa2e0693e)
    Conflicts:
     cinder/__init__.py