Comment 24 for bug 1382064

Reviewed: https://review.openstack.org/195792
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=07d3d4401f34a19b23738296c189122eeef9150f
Submitter: Jenkins
Branch: stable/juno

commit 07d3d4401f34a19b23738296c189122eeef9150f
Author: Eugene Nikanorov <email address hidden>
Date: Mon May 11 01:34:35 2015 +0400

    Randomize tunnel id query to avoid contention

    When networks are created rapidly, neutron-servers compete
    for segmentation ids which creates too much contention and
    may lead to inability to choose available id in hardcoded amount
    of attempts (11)
    Randomize tunnel id selection so that condition is not hit.

    (cherry picked from commit 1d9fd2aec00cb85034e5a23cc1beac33c74e0110)
    Conflicts:
            neutron/plugins/ml2/drivers/helpers.py

    Related-Bug: #1382064
    Closes-Bug: #1454434
    Change-Id: I7068f90fe4927e6e693f8a62cb704213b2da2920