delete quota shouldn't delete the data of resources which in use or reserve

[huangtianhua]

Set the item security_group_api=nova.

All my operations as follows:

1.Update security_groups quota for a project.
   PUT http://172.25.16.1:8774/v2/e7f9721a01a942d49262a7c016dcd290/os-quota-sets/e7f9721a01a942d49262a7c016dcd290
        {
          "quota_set":
                  {
                      "security_groups": 2
                  }
        }
2.Create two security_group for the project.
3.Update the quota to 1 of the project again.The server raises error:"Quota value 1 for security_groups are greater than already used and reserved 2".It's OK.
4.Delete the quota of this project.The quota of this project back to the default values.It's OK.
5.Update the quota to 1 of the project again.The server accept the cmd and set the security_groups quota to 1.

I think it's a bug,the project has already create two security-groups,the quota shouldn't be set less than count of using.

All other resources has the same problem.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/54707

[Markus Zoeller (markus_z) (mzoeller)]

This is an automated cleanup. This bug report has been closed because it
is older than 18 months and there is no open code change to fix this.
After this time it is unlikely that the circumstances which lead to
the observed issue can be reproduced.

If you can reproduce the bug, please:
* reopen the bug report (set to status "New")
* AND add the detailed steps to reproduce the issue (if applicable)
* AND leave a comment "CONFIRMED FOR: <RELEASE_NAME>"
  Only still supported release names are valid (LIBERTY, MITAKA, OCATA, NEWTON).
  Valid example: CONFIRMED FOR: LIBERTY