fix TestGetDirectorySize

Author: yp05327

models/fixtures/repository.yml

@@ -26,7 +26,7 @@
   fork_id: 0
   is_template: false
   template_id: 0
-  size: 7320
+  size: 7763
   is_fsck_enabled: true
   close_issues_via_commit_in_any_branch: false