centos based images have wrong label info

[Jawon Choo]

It seems centos based images have wrong label info.

[root@kolla]# docker inspect kolla/centos-binary-memcached:3.0.3 | jq .[0].Created
"2017-04-06T05:54:51.409325763Z"
[root@kolla]# docker inspect kolla/centos-binary-memcached:3.0.3 | jq .[0].Config.Labels
{
  "build-date": "20170315",
  "kolla_version": "3.0.3",
  "license": "GPLv2",
  "name": "CentOS Base Image",
  "vendor": "CentOS"
}

This centos based kolla images was created at 2017-04-06.
But, in Labes infomation, build-date was set when CentOs Images was built.
and name, vendor also are implemented from the base centos image.
I think kolla shoud overwrite or delete these for exact information.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/461662

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/461662
Committed: https://git.openstack.org/cgit/openstack/kolla/commit/?id=31259fa595392c25a5e21d03c13e8896648a7695
Submitter: Jenkins
Branch: master

commit 31259fa595392c25a5e21d03c13e8896648a7695
Author: Jawon Choo <email address hidden>
Date: Tue May 2 16:23:09 2017 +0900

    Override image's meta info.

    centos based images have wrong label info,
    these changes fix own image's name and build-date.

    Change-Id: I1d13f8f386c8db12b5fbe5f8ecbbf9e3fbb4ba1c
    Closes-Bug: #1680341

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/kolla 5.0.0.0b2 development milestone.