[site:install] Allow empty db password (#3027)

Author: rpsu

src/Command/Site/InstallCommand.php

@@ -391,7 +391,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $dbHost = $input->getOption('db-host')?:'127.0.0.1';
         $dbName = $input->getOption('db-name')?:'drupal_'.time();
         $dbUser = $input->getOption('db-user')?:'root';
-        $dbPass = $input->getOption('db-pass')?:'root';
+        $dbPass = $input->getOption('db-pass');
         $dbPrefix = $input->getOption('db-prefix');
         $dbPort = $input->getOption('db-port')?:'3306';
         $force = $input->getOption('force');