[ticket/12492] Add support of special chars

Add support of special chars during db test in the installation

PHPBB3-12492
Merge pull request #2425 from Zoddo/ticket/12492

[ticket/12492] Add support of special chars

* Zoddo/ticket/12492:
  [ticket/12492] Add support of special chars
Merge branch 'develop-olympus' into develop-ascraeus

* develop-olympus:
  [ticket/12492] Add support of special chars