wrong description for "resource_limit" in limits API

[TommyLike]

"resource_limit" is described as array type in the table, but the example below shows it's an integer.

```
{
    "links": {
        "self": "http://10.3.150.25/identity/v3/limits",
        "previous": null,
        "next": null
    },
    "limits": [
        {
            "resource_name": "volume",
            "region_id": null,
            "links": {
                "self": "http://10.3.150.25/identity/v3/limits/25a04c7a065c430590881c646cdcdd58"
            },
            "service_id": "9408080f1970482aa0e38bc2d4ea34b7",
            "project_id": "3a705b9f56bb439381b43c4fe59dccce",
            "id": "25a04c7a065c430590881c646cdcdd58",
            "resource_limit": 11
        },
        {
            "resource_name": "snapshot",
            "region_id": "RegionOne",
            "links": {
                "self": "http://10.3.150.25/identity/v3/limits/3229b3849f584faea483d6851f7aab05"
            },
            "service_id": "9408080f1970482aa0e38bc2d4ea34b7",
            "project_id": "3a705b9f56bb439381b43c4fe59dccce",
            "id": "3229b3849f584faea483d6851f7aab05",
            "resource_limit": 5
        }
    ]
}
```

[Gage Hugo (gagehugo)]

https://github.com/openstack/keystone/blob/master/api-ref/source/v3/parameters.yaml#L1494-L1499

Should be integer instead of array.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/548231

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/548231
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=f0c0634a9285f7a13c9c9b6bfdfc9ca063cddd5b
Submitter: Zuul
Branch: master

commit f0c0634a9285f7a13c9c9b6bfdfc9ca063cddd5b
Author: wangxiyuan <email address hidden>
Date: Tue Feb 27 11:19:57 2018 +0000

    Api-ref: fix resource_limit format

    the resource_limit type is integer, not array.

    Change-Id: I62fa0a82092945e7d5e866b27eb66a9a6a4e7d86
    Closes-bug: #1751755

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/keystone 14.0.0.0b1 development milestone.