Comment 5 for bug 1744780

Reviewed: https://review.openstack.org/536546
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=0467b537bfcf0cb973eb74b49ff7207dafbdbdbc
Submitter: Zuul
Branch: master

commit 0467b537bfcf0cb973eb74b49ff7207dafbdbdbc
Author: Dan Smith <email address hidden>
Date: Mon Jan 22 11:57:53 2018 -0800

    Fix update_cell to ignore existing identical cells

    The recent cell duplication filter makes it impossible to do update_cell
    on an existing cell with identical details. If we're updating a cell by
    uuid and specify the exact same parameters, we shouldn't signal failure.

    Change-Id: I2faaec94444bc7d29fda1facd22e0da3bc6f01f9
    Closes-Bug: #1744780