Add a generation number to the object meta of all objects, and status of rcs

pkg/api/validation/validation.go

@@ -220,7 +220,9 @@ func ValidateObjectMeta(meta *api.ObjectMeta, requiresNamespace bool, nameFn Val
 			allErrs = append(allErrs, errs.NewFieldInvalid("name", meta.Name, qualifier))
 		}
 	}
-
+	if meta.Generation < 0 {
+		allErrs = append(allErrs, errs.NewFieldInvalid("generation", meta.Generation, isNegativeErrorMsg))
+	}
 	if requiresNamespace {
 		if len(meta.Namespace) == 0 {
 			allErrs = append(allErrs, errs.NewFieldRequired("namespace"))