wrong data in jsonfile generated by osrf writer

[Aaron DH]

`cloudkitty-writer generate` with osrf writer and the result has wrong data:

part of result like:

{"usage": {"compute": [{"vol": {"unit": "instance", "qty": 1.0}, "rating": {"price": 0.0}, "tenant_id": "4e3b55abd5284a2eb4f0654ccc8bb7a6", "desc": {"user_id": "4ecb9ecd6e4f4550b0db6f22eacc0851", "name": "test1105", "availability_zone": "nova", "instance_id": "be4e0562-e711-47d1-8b5a-88bb9966ebe1", "image_id": "d98feba8-ee5c-4e41-9ac2-aee618ad0a3b", "vcpus": "1", "memory": "512", "flavor": "m1.tiny", "project_id": "4e3b55abd5284a2eb4f0654ccc8bb7a6", "metadata": {}}}]}, "period": {"begin": "2015-11-05T02:00:00", "end": "2015-11-05T03:00:00"}},

{"usage": {}, "period": {"begin": "2015-11-05T02:00:00", "end": "2015-11-05T03:00:00"}}
== this record has the same begin and end time with last record ==

{"usage": {"compute": [{"vol": {"unit": "instance", "qty": 1.0}, "rating": {"price": 0.0}, "tenant_id": "4e3b55abd5284a2eb4f0654ccc8bb7a6", "desc": {"user_id": "4ecb9ecd6e4f4550b0db6f22eacc0851", "name": "test1105", "availability_zone": "nova", "instance_id": "be4e0562-e711-47d1-8b5a-88bb9966ebe1", "image_id": "d98feba8-ee5c-4e41-9ac2-aee618ad0a3b", "vcpus": "1", "memory": "512", "flavor": "m1.tiny", "project_id": "4e3b55abd5284a2eb4f0654ccc8bb7a6", "metadata": {}}}]}, "period": {"begin": "2015-11-05T03:00:00", "end": "2015-11-05T04:00:00"}}

{"usage": {}, "period": {"begin": "2015-11-05T03:00:00", "end": "2015-11-05T04:00:00"}} == this record has the same begin and end time with last record ==

this is similar to bug1511206

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/522416

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/522416
Committed: https://git.openstack.org/cgit/openstack/cloudkitty/commit/?id=c7ba8dace959585024f1495adc9c5d003b784f5f
Submitter: Zuul
Branch: master

commit c7ba8dace959585024f1495adc9c5d003b784f5f
Author: zhangguoqing <[e-mail]>
Date: Thu Nov 23 01:00:32 2017 +0000

    Fix wrong data in jsonfile generated by osrf writer

    The redundant commit of backend leds to the addition of wrong data that
    usage is None and period is repeated.
    {"usage": {}, "period": {"begin": "xxxx", "end": "xxxx"}
    Closes-bug: #1516968

    Change-Id: Ifee499bc645f30d0ffcc53c2e2c9d05587e76940

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/cloudkitty 7.0.0 release.