Field in schema with DateTimeField isn't generated as date-time type.

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Checklist

• I have verified that that issue exists against the master branch of Django REST framework.
• I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• This is not a usage question. (Those should be directed to the discussion group instead.)
• This cannot be dealt with as a third party library. (We prefer new functionality to be in the form of third party libraries where possible.)
• I have reduced the issue to the simplest possible case.
• I have included a failing test as a pull request. (If you are unable to do so we can still accept the issue.)

Steps to reproduce

Add DateTimeField to REST API.

Expected behavior

myurl/schema should provide JSON with field saying it is date-time and not just any string.

Actual behavior

       "name": "myDate",
                    "required": true,
                    "location": "form",
                    "schema": {
                        "_type": "string",
                        "title": "MyDate",
                        "description": ""
                    }

[carltongibson]

Duplicate of #5511

This was already addressed to the extent that's possible with CoreAPI as it stands.
Should improve with upcoming changes.

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Are there any expectations when this will be working with django release ?