api: Add response body schemas for server shares APIs

We had missed one.

Change-Id: Icc63959d73b1881b7db19b93cf8fb80dcb77cad8
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

nova/api/openstack/compute/schemas/server_shares.py

@@ -73,6 +73,8 @@ show_response = {
     'additionalProperties': False
 }
 
+delete_response = {'type': 'null'}
+
 index_response = {
     'title': 'Server shares',
     'type': 'object',

nova/api/openstack/compute/server_shares.py

@@ -38,6 +38,7 @@ def _get_instance_mapping(context, server_id):
         raise webob.exc.HTTPNotFound(explanation=e.format_message())
 
 
+@validation.validated
 class ServerSharesController(wsgi.Controller):
     _view_builder_class = server_shares.ViewBuilder
 
@@ -231,6 +232,7 @@ class ServerSharesController(wsgi.Controller):
     @wsgi.api_version("2.97")
     @wsgi.response(200)
     @wsgi.expected_errors((400, 403, 404, 409))
+    @validation.response_body_schema(schema.delete_response)
     def delete(self, req, server_id, id):
         context = req.environ["nova.context"]
         # Get instance mapping to query the required cell database