Description of problem:

According to http://manageiq.org/docs/reference/latest/api/overview/http#updating-resources, resources can be updated using the "edit" action with POST method, or using PATCH and PUT HTTP methods.

While the "edit" action with POST method is listed in "actions" attribute of every resource that supports updates, the "edit" actions with PATCH and PUT methods are not listed:
GET /api/users/:id
{
    "href": "https://<address>/api/users/:id",
    "id": :id,
    "name": "Administrator",
    ...
    "actions": [
        {
            "name": "edit",
            "method": "post",
            "href": "https://<address>/api/users/:id"
        },
        {
            "name": "delete",
            "method": "post",
            "href": "https://<address>/api/users/:id"
        },
        {
            "name": "delete",
            "method": "delete",
            "href": "https://<address>/api/users/:id"
        }
    ]
}

Version-Release number of selected component (if applicable):
all versions including 5.7.x - 5.9.x


How reproducible:
very