Comment 7 for bug 1668828

Reviewed: https://review.openstack.org/439428
Committed: https://git.openstack.org/cgit/openstack/tempest/commit/?id=7d8f7c5669f42178ae47aa1a6446eda42910a390
Submitter: Jenkins
Branch: master

commit 7d8f7c5669f42178ae47aa1a6446eda42910a390
Author: zhufl <email address hidden>
Date: Wed Mar 1 15:41:41 2017 +0800

    Correct test_list_servers_filtered_by_ip for bug 1668828"

    test_list_servers_filtered_by_ip will fail occasionally, because
    now on Nova side filter by ip is always "regexp match",
    https://github.com/openstack/nova/blob/master/nova/api/openstack/compute/schemas/servers.py#L355
    so if server1's ip is "10.1.1.1" and servers2's ip is "10.1.1.10",
    filter by server1's ip "10.1.1.1" will get both servers in the list.

    This is to use the longest ip for the filter, i.e., if server1's
    ip is "10.1.1.1" and server2's ip is "10.1.1.10", then we should use
    "10.1.1.10" for the filter, so to ensure only one server is returned
    in the list.

    Change-Id: I87c325cb80a95861287c54fbd1b5718cfb9ef310
    Closes-Bug: #1668828