Cosmetic fixes for test: VectorScopedDefaultConstructible
Cosmetic fixes for test: VectorScopedDefaultConstructible

Summary: Cosmetic fixes after diff: D37741640 (https://github.com/facebook/folly/commit/25bad5f06fbc42f41dcd0ba363ffa6eb967237de)

Reviewed By: nadavrot

Differential Revision: D37968878

fbshipit-source-id: 86db5ddff4e61bdc3ba7573d94c445ec024442b5

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly