Python3.5 RuntimeError: dictionary changed size during iteration

[Dong Jun]

In Python3, keys() is not a copy, therefore items can't be changed while iterating[0].
A runtime[1] error ocurred.

[0]https://github.com/openstack/networking-ovn/blob/master/networking_ovn/ovsdb/impl_idl_ovn.py#L504
[1]http://logs.openstack.org/20/499820/1/check/gate-networking-ovn-dsvm-functional-py35/5739ef7/console.html#_2017-09-05_01_56_05_462175

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/501062

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/501062
Committed: https://git.openstack.org/cgit/openstack/networking-ovn/commit/?id=034de8c2822aeaa4e2ebbeb13573c24768a050ec
Submitter: Jenkins
Branch: master

commit 034de8c2822aeaa4e2ebbeb13573c24768a050ec
Author: Dong Jun <email address hidden>
Date: Tue Sep 5 14:45:14 2017 +0800

    Python3.5 RuntimeError: dictionary changed size during iteration

    In Python3, dict.keys() is not a copy, therefore items can't be changed
    while iterating.

    Change-Id: I7a62b56d3258b816b6ce59aac31959353ee7fe06
    Closes-bug: #1715057
    Signed-off-by: Dong Jun <email address hidden>

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/networking-ovn 4.0.0.0b1 development milestone.