[ticket/11867] Schema files are not created by create_schema_files.php

PHPBB3-11867
Merge remote-tracking branch 'nickvergessen/ticket/11867' into develop

# By Joas Schilling
# Via Joas Schilling
* nickvergessen/ticket/11867:
  [ticket/11867] Schema files are not created by create_schema_files.php