This is a horrible commit, but it cleans up hundreds of warnings that get thrown...

This is a horrible commit, but it cleans up hundreds of warnings that get thrown when a class is not specified, and it fixes it so that the broken admin tests pass. I'm pretty sure that ultimately we will want a better fix than this, but I'm taking the progress when I can get it. AFAICT the affore mentioned problems were introduced in https://github.com/phppgadmin/phppgadmin/commit/4680728829d8f95e29514512c9e94bb5345aa58a. If that was something you wanted, it's quite possibly broken now.