Luggage_isu 3.5.2-5.2 Released

Merged with upstream Luggage 3.5.2
Drupal 7.56
https://www.drupal.org/SA-CORE-2017-003

https://github.com/isubit/luggage_isu/releases/tag/5.2

This release skips the Drupal 7.55 release.