Add filters for install/upgrade queries, so that unit tests installer can...

Add filters for install/upgrade queries, so that unit tests installer can force creating InnoDB tables, so that we can use transactions to revert the database to its initial state after each test. See #17749


git-svn-id: https://core.svn.wordpress.org/trunk@18531 1a063a9b-81f0-0310-95a4-ce76da25c4cd