Use correct exit codes

Fixes command-line issues e.g. running unit tests

qa-include/qa-base.php

@@ -705,7 +705,9 @@
 */
 	{
 		qa_report_process_stage('shutdown', $reason);
-		exit;
+
+		$code = $reason === 'error' ? 1 : 0;
+		exit($code);
 	}
 
 

qa-tests/phpunit-qa-config.php

 <?php
 // Stand-in config file for PHPUnit
 
-define('QA_MYSQL_HOSTNAME', '');
+define('QA_MYSQL_HOSTNAME', 'localhost');
 define('QA_MYSQL_USERNAME', '');
 define('QA_MYSQL_PASSWORD', '');
 define('QA_MYSQL_DATABASE', '');