Comment 4 for bug 1545658

Reviewed: https://review.openstack.org/280163
Committed: https://git.openstack.org/cgit/openstack/designate/commit/?id=4047dc24cae838525b78245f3d2ee84455b49d9e
Submitter: Jenkins
Branch: stable/liberty

commit 4047dc24cae838525b78245f3d2ee84455b49d9e
Author: Kiall Mac Innes <email address hidden>
Date: Mon Feb 15 11:13:40 2016 +0000

    Ensure ZoneManager emits valid objects

    Zone Manager exists events have been sending Designate obj
    representiations rather than plain dicts. Additionally,
    the audit period values were not in the correct format
    due to an explicit datetime -> str cast vs allowing the
    serializer to handle the conversion.

    Additionally, remove duplicated RoObject class and implement
    the to_dict() method.

    Change-Id: I6892433b5c112563901dbac2b477bf3d9e56217b
    Closes-Bug: 1545658