[FIX] installer: More on changes following from r50989 for the database collation fix script.
Now using SHOW TABLES and fetchAll, also re-fetch local.php to get real database name (thanks to Jyhem, LPH and all for the input)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@51037 b456876b-0849-0410-b77d-98878d47e9d5