Comment 2 for bug 1810280

Reviewed: https://review.openstack.org/627952
Committed: https://git.openstack.org/cgit/openstack/oslo.service/commit/?id=811650783d32accd2b49f907ddc520955146962c
Submitter: Zuul
Branch: master

commit 811650783d32accd2b49f907ddc520955146962c
Author: venkata anil <email address hidden>
Date: Wed Jan 2 05:11:12 2019 -0500

    Avoid eventlet_backdoor listing on same port

    Oslo.service is binding to same port when we provide a port range
    as eventlet is internally setting SO_REUSEPORT flag (starting from
    eventlet version v0.20). And there is a flag (reuse_port)
    introduced in v0.22 to give control to user to avoid SO_REUSEPORT.
    In this patch, first we try passing reuse_port=False, if this fails
    then directly open socket and listen instead of eventlist.listen.

    Closes-Bug: #1810280
    Change-Id: Idc842acc7e430199c76fe12785b0bf0e7a58e121