Comment 9 for bug 1461251

Reviewed: https://review.openstack.org/394226
Committed: https://git.openstack.org/cgit/openstack/cloudkitty/commit/?id=932b5feb7c489bda748c8bc50efa7fa9bbff21ba
Submitter: Jenkins
Branch: master

commit 932b5feb7c489bda748c8bc50efa7fa9bbff21ba
Author: Luong Anh Tuan <email address hidden>
Date: Mon Nov 7 09:01:58 2016 +0700

    Replace oslo_utils.timeutils.isotime

    Function 'oslo_utils.timeutils.isotime()' is deprecated in version '1.6'
    and will be removed in a future version. We cant't use
    datetime.datetime.isoformat() instead. Because the format of the string
    generated by isoformat isn't the same as the format of the string
    generated by isotime. The string is used in tokens and other public
    APIs and we can't change it without potentially breaking clients.

    So the workaround is to copy the current implementation from
    oslo_utils.timeutils.isotime() to utils.py

    For more informations:
    http://docs.openstack.org/developer/oslo.utils/api/timeutils.html#oslo_utils.timeutils.isotime

    Change-Id: Ib384ae8130dcc6cbd47a837d11ca171ce02ef29e
    Closes-Bug: #1461251