/**
* Set up LBFactory so that wfGetDB() etc. works.
* We set up a special LBFactory instance which returns the current
* installer connection.
*/
public function enableLB()
{
$status = $this->getConnection();
if (!$status->isOK()) {
throw new MWException(__METHOD__ . ': unexpected DB connection error');
}
LBFactory::setInstance(new LBFactory_Single(array('connection' => $status->value)));
}