fix up unittest failure due to utils.Retry changes.

Bug: None
Test: ./run_tests.sh
Change-Id: I0cbf736784837e74dcee03b61428691765c14285
diff --git a/internal/lib/gstorage_client.py b/internal/lib/gstorage_client.py
index 6c2e1e9..07a6084 100755
--- a/internal/lib/gstorage_client.py
+++ b/internal/lib/gstorage_client.py
@@ -157,9 +157,10 @@
         """
         item = utils.RetryExceptionType(
             errors.ResourceNotFoundError,
-            max_retries=self.GET_OBJ_MAX_RETRY,
-            functor=self.Get,
-            sleep_multiplier=self.GET_OBJ_RETRY_SLEEP,
+            self.GET_OBJ_MAX_RETRY,
+            self.Get,
+            self.GET_OBJ_RETRY_SLEEP,
+            utils.DEFAULT_RETRY_BACKOFF_FACTOR,
             bucket_name=bucket_name,
             object_name=object_name)
         return item["selfLink"]