Api-ref: Add missing parameter in the version api

Add missing updated parameter in the version api.
besides, change media-types parameter in body and
required.

Change-Id: Ib0123f16a969ecc98f5dccd2a03eab621e02d8c8

api-ref/source/parameters.yaml

@@ -3736,6 +3736,12 @@ version_max:
     If this version of the API supports microversions, the maximum
     microversion that is supported. This will be the empty string if
     microversions are not supported.
+version_media_types:
+  description: |
+      Media types supported by the API.
+  in: body
+  required: true
+  type: object
 version_min:
   type: string
   in: body
@@ -3754,6 +3760,13 @@ version_status:
     - ``CURRENT``: this is the preferred version of the API to use
     - ``SUPPORTED``: this is an older, but still supported version of the API
     - ``DEPRECATED``: a deprecated version of the API that is slated for removal
+version_updated:
+  description: |
+    A date and time stamp for API versions. This field presents no meaningful
+    information.
+  in: body
+  required: true
+  type: string
 versions:
   type: array
   in: body

api-ref/source/versions.inc

@@ -46,9 +46,10 @@ Response
 
   - versions: versions
   - id: version_id
+  - updated: version_updated
   - status: version_status
   - links: links
-  - media-types: media_types
+  - media-types: version_media_types
   - version: version_max
   - min_version: version_min
 
@@ -103,8 +104,9 @@ Response
   - status: version_status
   - links: links
   - version: version_max
+  - updated: version_updated
   - min_version: version_min
-  - media-types: media_types
+  - media-types: version_media_types
 
 .. note::