integration-tests/storage: fix bad format string

Change-Id: I77683da72f01c825ed4eec0b017ae2eb69d9eada
Reviewed-on: https://code-review.googlesource.com/33031
Reviewed-by: Jean de Klerk <deklerk@google.com>
diff --git a/integration-tests/storage/integration_test.go b/integration-tests/storage/integration_test.go
index 8265059..9200194 100644
--- a/integration-tests/storage/integration_test.go
+++ b/integration-tests/storage/integration_test.go
@@ -405,7 +405,7 @@
 		}
 		obj, err := s.Objects.Insert(bucket, o).Media(f).Do()
 		if err != nil {
-			t.Fatalf("unable to insert object %q: %v", obj, err)
+			t.Fatalf("unable to insert object %v: %v", obj, err)
 		}
 		if got, want := obj.Size, c.size; got != want {
 			t.Errorf("object %q size = %v; want %v", c.name, got, want)