fix attribute names on ProgressDetail

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

api/swagger.yaml

@@ -1545,9 +1545,9 @@ definitions:
   ProgressDetail:
     type: "object"
     properties:
-      code:
+      current:
         type: "integer"
-      message:
+      total:
         type: "integer"
 
   ErrorResponse: