Comment 2 for bug 1793391

Reviewed: https://review.openstack.org/603921
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=3b5373b4efffc4213bf8753680c9ed3cc305b0d4
Submitter: Zuul
Branch: master

commit 3b5373b4efffc4213bf8753680c9ed3cc305b0d4
Author: Harald Jensås <email address hidden>
Date: Wed Sep 19 15:36:27 2018 +0200

    Allow update request with current segment_id

    If the segment_id in the update request equals the segment_id
    already associated with the subnet being updated, there is no
    need for further update related segment validations.

    Closes-Bug: #1793391
    Change-Id: I65cd5b92b219c14dd07ae72457af243756c4ed02